Contributed on June 10, 2014

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2.2K

Structured Approach to Solution Architecture

Description

The role of solution architecture is to identify answer to a business problem and set of solution options and their components. There will be many potential solutions to a problem with varying degrees of suitability to the underlying business need. Solution options are derived from a combination of Solution Architecture Dimensions/Views which describe characteristics, features, qualities, requirements and Solution Design Factors, Limitations And Boundaries which delineate limitations. Use of structured approach can assist with solution design to create consistency. The TOGAF approach to enterprise architecture can be adapted to perform some of the analysis and design for elements of Solution Architecture Dimensions/Views.

Transcript

Structured Approach to
Solution Architecture
Alan McSweeney
June 12, 2014 2
Solution Architecture Is …
− Description of the structure, characteristics and behaviour of a
solution
− The means by which the solution is defined, delivered, managed
and operated
• A solution is an answer to a business problem that may or
may not include a technology component
• Solution architecture is concerned with identifying that
solution or set of solution options and their components
• Generally there are many potential solutions to a problem
with varying suitability
• All solutions are subject to constraints
Structured Approach to Solution Architecture
• Objective is to ensure consistency in solution architecture
design options
• Ensure solution addresses all business requirements
• Provide checklist to validate solution design options
• Design realistic and achievable solutions that meet the
business needs
• Adapt elements of TOGAF to assist with structured
solution design
June 12, 2014 3
June 12, 2014 4
Solution Architecture In Context
Business
Objectives
Business
Operational
Model
Enterprise
Architecture
Solution
Delivery
Management
And
Operations
Business
Processes
Business
Systems
Business
Strategy
Solution
Architecture
Solution Architecture
June 12, 2014 5
Enterprise
Architecture
Solution
Delivery
Business
Systems
Solution
Architecture
Takes the
requirements for
solutions to
business needs
Ensures compliance
with overall systems
architecture
standards
Designs solution options
based on requirements
subject to standards and
other solution constraints
that are then implemented
Solution Architecture
June 12, 2014 6
Enterprise
Architecture
Solution
Delivery
Business
Systems
Solution
Architecture
Takes the
requirements for
solutions to
business needs
Ensures compliance
with overall systems
architecture
standards
Designs solution options
based on requirements
subject to standards and
other solution constraints
that are then implemented
Goal is to ensures
solutions implemented
deliver business
requirements
accurately, efficiently
and in a timely manner
with no surprises
June 12, 2014 7
Solution Architecture In Context
Business
Strategy
Business
Objectives
Business
Operational
Model
Enterprise
Architecture
Business
Processes
Business
Systems
Solution
Architecture
Solution
Delivery
Management
And Operations
Processes operationalise
business objectives
Operational model defined to
achieve objectives
Architecture defines technology
framework to run operational model
Objectives derived
from strategy
Systems assist with the
operation of processes
Solution architecture defines business systems
design within enterprise architecture principles
Solutions are implemented according
to the solution architecture
June 12, 2014 8
Solution Does Not Always Consist Solely Of A New
Application
External
Manual
Interaction
External
Manual
Interaction
External
Manual
Interaction
External
Manual
Interaction
Extended Application
(Other Systems)
System
Component
System
Component
System
Component
External
Component
External
Component
External
Component
Core
Application
June 12, 2014 9
Complete View of Solution
System
Component
System
Component
System
Component
External
Component
External
Component
External
Component
Automated
Process
Automated
Process
Automated
Process
External
Manual
Interaction
External
Manual
Interaction
Manual
Process
Manual
Process
External
Manual
Interaction
External
Manual
Interaction
Manual
Process
Manual
Process
June 12, 2014 10
Overall Solution Can Be A Combination of
Automated and Manual Processes
Automated
Process
Automated
Process
Automated
Process
Manual
Process
Manual
Process
Manual
Process
Manual
Process
Extended Application
Core
Application
June 12, 2014 11
Solution Design and Implementation Sequence
Business Plan
Business Need
Business Benefits
Requirements
Definition
Process Design
Solution Architecture
and Design
Technical and
Detailed Design
Implementation
You Can Iterate
Through These Steps
Multiple Times, Refining
Detail Each Stage
June 12, 2014 12
TOGAF Enterprise Architecture Development and
Implementation Process
Architecture
Change
Management
Implementation
Governance
Migration
Planning
Opportunities
and Solutions
Technology
Architecture
Information
Systems
Architecture
Business
Architecture
Architecture
Vision
Requirements
Management
Data
Architecture
Solutions and
Application
Architecture
Business solutions fit into these
areas of the TOGAF framework
Extended Solution ViewsCore Solution Views
June 12, 2014 13
Solution Architecture Dimensions/Views
Solution
Architecture
Dimensions
Business
View
Functional
View
Data
View
Technical
View
Implementation
View
Management
And
Operation
Core Views and Extended Views
• Core Solution Architecture Views – concerned with the
kernel of the solution
− Business
− Functional
− Data
• Extended Solution Architecture Views – concerned with
solution implementation and operation
− Technical
− Implementation
− Management and Operation
June 12, 2014 14
Solution Architecture Dimensions/Views
• Dimensions/views are structured sets of requirements,
conditions, specifications, provisions, concerns and
fundamentals for each dimension of the overall solution
• Core dimensions/views define what the solution must do
and the results expected
• Extended dimensions/views define how the solution must
be implemented, managed and operated
June 12, 2014 15
Generalised Solution Architecture
Sub-System 1
Primary Processor
Sub-System 2
Monitor, Audit,
Manage
Sub-System 3
Control Data
Storage
and Flow
June 12, 2014 16
Generalised Solution Architecture
• Sub-System 1 – performs primary activities, functions that accepts
and process inputs, performs transformations and creates and
presents outputs, divided into multiple components, implements
and actualises processes and activities
• Sub-System 2 – monitors, audits, measures, manages performance
and activities of the components of sub-system 1
• Sub-System 3 – controls operation and communication and storage
of data of an between the components of sub-system 1 and
between sub-system 1 and sub-system 2
June 12, 2014 17
Generalised Solution Architecture
• Useful in defining the components of the solution
June 12, 2014 18
Solution Core Views
Business and Process
View
Processes Enabled and
Actualised by Solution and its
Functions
Data View
Range of Data Being
Processed/Handled
Functionaland
ResultsView
W
hatisGenerated/
Created/
Achieved/
Output
June 12, 2014 19
Solution Core Views And Their Interrelationships
Data View
Range of Data
Being Processed/
Handled
Business and
Process View
Processes Enabled
and Actualised by
Solution and
its Functions
Functions and
Results View
What is Generated/
Created/Achieved
Functions
Generate
Results
Consist of
Created or
Transformed
Data
Business
Processes
Read and
Generate Data
Processes Are
Implemented by
Functions that
Generate ResultsJune 12, 2014 20
Business and Process View And Decomposition
Process 1
Activity 1.1 Activity 1.N
Task 1.1.1
Step 1.1.1.1 Step 1.1.1.N
Task 1.1.N Task 1.N.1 Task 1.N.N
Step 1.N.N.1 Step 1.N.N.N
Process N…
…
… …
… …
June 12, 2014 21
Data View And Decomposition
Data Type 1
Data Element 1.1 Data Element 1.N
Data Attribute
1.1.1
Data Attribute
Value 1.1.1.1
Data Attribute
Value 1.1.1.N
Data Attribute
1.1.N
Data Attribute
1.N.1
Data Attribute
1.N.N
Data Attribute
Value 1.N.N.1
Data Attribute
Value 1.N.N.N
Data Type N…
…
… …
… …
June 12, 2014 22
Functions/Results/Outputs View And Decomposition
Output 1
Output Element
1.1
Output Element
1.N
Output Attribute
1.1.1
Output Attribute
Value 1.1.1.1
Output Attribute
Value 1.1.1.N
Output Attribute
1.1.N
Output Attribute
1.N.1
Output Attribute
1.N.N
Output Attribute
Value 1.N.N.1
Output Attribute
Value 1.N.N.N
Output N…
…
… …
… …
June 12, 2014 23
Solution Core Views
Business and Process
View
Data View
Functionaland
ResultsView
June 12, 2014 24
June 12, 2014 25
Dimensions/Views Of Solution Architecture
Solution
Architecture
Dimensions
Business View Functional View Technical View
Implementation
View
Data View
Context
Purpose
Characteristics
Context
Stakeholders
Characteristics
Context
Structure
Operation
Development
Characteristics
Context
Artefacts/
Products
Execution
Characteristics
Context
Entities
Roles
Interfaces
Characteristics
Management
and Operations
View
Context
Operational
Processes
Support
Operation
Characteristics
June 12, 2014 26
Business And Process View Topics
Business Requirements View
Business Context Purpose Characteristics
Business Environment
Resources, Skills and Experience
Products, Services and Value
Propositions
Value Chain
Stakeholders
Business Processes
Availability, Continuity and Resilience
Cost and Affordability
Flexibility and Ability to Evolve
Ease of Implementation
Suitability and Efficiency
Performance
Reliability
Manageability and Ease of Operation
Linkage to Other Systems
Stability
Security
Usability
June 12, 2014 27
Functional And Results View Topics
Functional View
Functional Context Purpose Characteristics
Related Systems
Operational Processes
Products, Services and Value
Propositions
Value Chain
Stakeholders
Business Processes
Availability, Continuity and Resilience
Cost and Affordability
Flexibility and Ability to Evolve
Ease of Implementation
Suitability and Efficiency
Performance
Reliability
Manageability and Ease of Operation
Linkage to Other Systems
Scalability
Security
Usability
June 12, 2014 28
Technical View Topics
Technical View
Technical Context Technical Configuration Operation
Implementation
Environment and Tools
Development Approach
Language
Framework/Systems
Availability, Continuity
and Resilience
Cost and Affordability
Flexibility and Ability to
Evolve
Ease of Implementation
Suitability and
Efficiency
Performance
Reliability
Manageability and Ease
of Operation
Linkage to Other
Systems
Scalability
Security
Usability
Innovation and Growth Characteristics
System Structure
Hardware Infrastructure
Software Infrastructure
System Operation
System Management
and Administration
System Lifecycle
System Change and
Growth
Data Infrastructure
Integration
Infrastructure
June 12, 2014 29
Implementation View Topics
Technical View
Implementation Context
Implementation
Artefacts/Products
Execution
Implementation Environment
Development Approach
Language
Framework/Systems
Availability, Continuity and
Resilience
Cost and Affordability
Flexibility and Ability to
Evolve
Ease of Implementation
Suitability and Efficiency
Performance
Reliability
Manageability and Ease of
Operation
Linkage to Other Systems
Scalability
Security
Usability
Characteristics
Solution Elements
Delivered Components
Collateral
Governance
Implementation Organisation
Supporting Material
Implementation Process
Delivery Plan
Configuration
Financial Management
Solution Validation
Data View Topics
June 12, 2014 30
Data View
Data Context Entitles Interfaces
Data Model
Reference and Master
Data
Availability, Continuity
and Resilience
Cost and Affordability
Flexibility and Ability to
Evolve
Ease of Implementation
Suitability and Efficiency
Performance
Reliability
Manageability and Ease
of Operation
Storage and Capacity
Scalability
Security
Usability
Analysis and Reporting Characteristics
Data Entities
Relationships
Access Rights and
Permissions
Sources and Targets
Transformations
Reporting
Analysis
Data Types
Data Types
Conversion/Migration
Data Volumes
Data Velocity
Data Variety
Management and Operation View Topics
June 12, 2014 31
Management and
Operation View
Management and
Operation Context
Operational Processes Support
Service Management
Framework
Operational Framework
Transition
Business Readiness
Availability, Continuity
and Resilience
Cost and Affordability
Flexibility and Ability to
Evolve
Ease of Implementation
Suitability and Efficiency
Performance
Reliability
Manageability and Ease
of Operation
Linkage to Other Systems
Scalability
Security
Usability
Operation Characteristics
Capacity
Availability, Continuity
and Resilience
Change
Support Model
Support Processes
Deployment/
Maintenance Structure
Deployment/
Maintenance Process
Service Level
Service Desk
Service Management
Processes
Configuration
Release and Deployment
Incident
Problem
Organisational Change
Steady State
Alerting and Monitoring
Backup and Recovery
Service Level
Management
June 12, 2014 32
Mapping TOGAF Enterprise Architecture Process To
Solution Architecture Definition
TOGAF Phase
D: Technology
Architecture
TOGAF Phase
C: Information
Systems
Architecture
TOGAF Phase
B: Business
Architecture
TOGAF Phase
C1: Data
Architecture
TOGAF Phase
C2: Solutions
and
Application
Architecture
Business View
Data View
Technical View
Functional View
Implementation
View
Management and
Operation View
SolutionArchitecture
Views/Dimensions
Extended
Solution
Dimensions
Core
Solution
Dimensions
TOGAF
Solution
Dimensions
Solution Dimensions
Business View
Data View
Technical View
Functional View
Implementation
View
Management and
Operation View
June 12, 2014 33
Solution Architecture Design Boundaries
June 12, 2014 34
Enterprise Architecture Defines the
Solution Technical Boundary
Business View
Data View
Technical View
Functional View
Implementation
View
Management
and Operation
View
Solution
Architecture
Solution
Architecture
Defines the
Solution
Scope
Boundary
Designing The Solution
• Overall solution design is constrained both by enterprise
architecture and solution architecture views
• There are many possible solution options to a business
requirement or problem
− Solution can be manual or automated to a lesser or greater extent
− Solution can involve enhancing existing system and/or process or
developing new system and/or process
− These constraints form boundaries to the solution design
June 12, 2014 35
Solution Design Factors, Limitations And Boundaries
• Core Constraints – concerned with essential solution
attributes
− Enterprise Architecture
− Solution Architecture Views/Dimensions
− Existing or New System
− Degree of Automation
• Extended Constraints – concerned with solution
implementation and operation
− Resources
− Finance
− Timescale
− Expected Life
June 12, 2014 36
Core Solution Design Factors, Limitations And
Boundaries
Degree of Automation of Solution
Solution
Architecture
View Design
Constraints
Enterprise Architecture Constraints
Use
Existing
System or
Create New
System
Range of
Solution
Options
June 12, 2014 37
Extended Solution Design Factors, Limitations And
Boundaries
• Other implementation and operation-related constraints
that will affect the solution options:
− Resources and their availability
− Timescale and urgency of solution
− Cost and available finance
− Likely duration of solution
June 12, 2014 38
Different Solution Designs And Options Can Comply
With Constraints Differently
June 12, 2014 39
Comparison Of Possible Options For One Solution
June 12, 2014 40
Solution Architecture Dimensions/Views And
Solution Design Factors, Limitations And Boundaries
Extended Views
Core Views
June 12, 2014 41
Solution Design Factors,
Limitations And
Boundaries
Solution Architecture
Dimensions/Views
Solution Architecture Dimensions/Views And
Solution Design Factors, Limitations And Boundaries
Enterprise
Architecture
Technical View
Implementation View
Management and
Operation View
Business View
Data View
Functional View
Degree of
Automation
Finance
Timescale
Existing or
New System
Resources
Expected Life
June 12, 2014 42
June 12, 2014 43
Mapping TOGAF Enterprise Architecture Process To
Solution Architecture Definition
TOGAF Phase
D: Technology
Architecture
TOGAF Phase
C: Information
Systems
Architecture
TOGAF Phase
B: Business
Architecture
TOGAF Phase
C1: Data
Architecture
TOGAF Phase
C2: Solutions
and
Application
Architecture
Business View
Data View
Technical View
Functional View
Implementation
View
Management and
Operation View
SolutionArchitecture
Views/Dimensions
Steps For TOGAF View/Dimension Analysis And
Development
• Common set of steps across four solution architecture
views/dimensions common to TOGAF
1. Select reference models, viewpoints, and tools
2. Develop baseline view/dimension architecture description
3. Develop target view/dimension architecture description
4. Perform gap analysis
5. Define roadmap components
6. Resolve impacts across the architecture landscape
7. Conduct formal stakeholder review
8. Finalise the view/dimension architecture
9. Create view/dimension architecture definition document
June 12, 2014 44
Steps For TOGAF View/Dimension Analysis And
Development
• Use TOGAF framework to give a rigour to the solution
architecture analysis and design
• Modify as required to suit the depth of the analysis
• Can iterate through the steps with varying levels of
analysis as solution is articulated
June 12, 2014 45
TOGAF Steps For Business Dimension/View Analysis
And Design
June 12, 2014 46
Step 1 – Select Reference Models, Viewpoints, and
Tools (1)
• Select relevant Business Architecture resources (reference models, patterns, etc.)
from the Architecture Repository, on the basis of the business drivers, and the
stakeholders and concerns
• Select relevant Business Architecture viewpoints (e.g., operations, management,
financial); i.e. those that will enable the architect to demonstrate how the
stakeholder concerns are being addressed in the Business Architecture
• Identify appropriate tools and techniques to be used for capture, modeling, and
analysis
• Determine Overall Modelling Process
− For each viewpoint, select the models needed to support the specific view required,
using the selected tool or method
− Ensure that all stakeholder concerns are covered
− Identify the key business functions within the scope of the architecture, and maps those
functions onto the business units within the organisation
− Breakdown business-level functions across actors and business units to allow the actors
in a function to be identified and permits a breakdown into services
supporting/delivering that functional capability
− Breakdown a function or business service through process modeling to allow the
elements of the process to be identified and permit the identification of lower-level
business services or functions
June 12, 2014 47
Step 1 – Select Reference Models, Viewpoints, and
Tools (2)
• Identify Required Service Granularity Level, Boundaries, and
Contracts
− Business Architecture phase therefore needs to identify which components of
the architecture are functions and which are services
• Business services are specific functions that have explicit, defined boundaries that
are explicitly governed
• Services are distinguished from functions through the explicit definition of a service
contract
• A service contract covers the business/functional interface and also the
technology/data interface
− Business Architecture will define the service contract at the
business/functional level, which will be expanded on in the Application and
Technology Architecture phases
− Granularity of business services should be determined according to the
business drivers, goals, objectives, and measures for this area of the business
June 12, 2014 48
Step 1 – Select Reference Models, Viewpoints, and
Tools (3)
• Identify Required Catalogs of Business Building Blocks
− Catalogs capture inventories of the core assets of the business
− Catalogs form the raw material for development of matrices and
views and also act as a key resource for portfolio managing
business and IT capability
− Develop some or all of the following catalogs:
• Organisation/Actor catalog
• Driver/Goal/Objective catalog
• Role catalog
• Business Service/Function catalog
• Location catalog
• Process/Event/Control/Product catalog
• Contract/Measure catalog
June 12, 2014 49
Step 1 – Select Reference Models, Viewpoints, and
Tools (4)
• Identify Required Matrices
− Matrices show the core relationships between related model
entities
− Matrices form the raw material for development of views and
also act as a key resource for impact assessment, carried out as a
part of gap analysis
• Business interaction matrix – showing dependency and communication
between business units and actors
• Actor/role matrix – showing the roles undertaken by each actor
June 12, 2014 50
Step 1 – Select Reference Models, Viewpoints, and
Tools (5)
• Identify Required Diagrams
− Diagrams present the Business Architecture information from a
set of different perspectives according to the requirements of the
stakeholders
• Business Footprint diagram
• Business Service/Information diagram
• Functional Decomposition diagram
• Goal/Objective/Service diagram
• Use-case diagram
• Organisation Decomposition diagram
• Process Flow diagram
• Events diagram
June 12, 2014 51
Step 1 – Select Reference Models, Viewpoints, and
Tools (6)
• Identify Types of Requirement to be Collected
− Once the Business Architecture catalogs, matrices, and diagrams have been
developed, architecture modeling is completed by formalising the business-
focused requirements for implementing the Target Architecture
− Requirements may relate to the business domain, or may provide
requirements input into the Data, Application, and Technology Architectures
− Types of requirement
• Functional requirements
• Non-functional requirements
• Assumptions
• Constraints
• Domain-specific Business Architecture principles
• Policies
• Standards
• Guidelines
• Specifications
June 12, 2014 52
Step 2 – Develop Baseline Business Architecture
Description
• Develop a Baseline Description of the existing Business
Architecture, to the extent necessary to support the Target
Business Architecture
• Scope and level of detail to be defined will depend on the
extent to which existing business elements are likely to be
carried over into the Target Business Architecture
June 12, 2014 53
Step 3 – Develop Target Business Architecture
Description
• Develop a Target Description for the Business Architecture,
to the extent necessary to support the Architecture Vision
• Scope and level of detail to be defined will depend on the
relevance of the business elements to attaining the Target
Architecture Vision
June 12, 2014 54
Step 4 – Perform Gap Analysis
• Verify the architecture models for internal consistency and
accuracy
• Perform trade-off analysis to resolve conflicts (if any)
among the different views
• Validate that the models support the principles, objectives,
and constraints
• Test architecture models for completeness against
requirements
• Identify gaps between the baseline and target
June 12, 2014 55
Step 5 – Define Roadmap Components
• Create a business roadmap to prioritise activities over the
coming phases
• Initial Business Architecture roadmap will be used as raw
material to support more detailed definition of a
consolidated, cross-discipline roadmap within the
Opportunities and Solutions phase
June 12, 2014 56
Step 6 – Resolve Impacts Across the Architecture
Landscape
• Understand any wider impacts or implications of proposed
Business Architecture
− Does this Business Architecture create an impact on any pre-
existing architectures?
− Have recent changes been made that impact on the Business
Architecture?
− Are there any opportunities to leverage work from this Business
Architecture in other areas of the organisation?
− Does this Business Architecture impact other projects (including
those planned as well as those currently in progress)?
− Will this Business Architecture be impacted by other projects
(including those planned as well as those currently in progress)?
June 12, 2014 57
Step 7 – Conduct Formal Stakeholder Review
• Check the original motivation for the architecture project
and the Statement of Architecture Work against the
proposed Business Architecture
• Is fit for the purpose of supporting subsequent work in the
other architecture domains?
• Refine the proposed Business Architecture but only if
necessary
June 12, 2014 58
Step 8 – Finalise the Business Architecture
• Select standards for each of the building blocks re-using as much as
possible from the reference models selected from the Architecture
Repository
• Document each building block
• Conduct final cross-check of overall architecture against business
goals
• Document reason for building block decisions in the architecture
document
• Document final requirements traceability report
• Document final mapping of the architecture within the Architecture
Repository and publish via the Architecture Repository
• Finalise all the work products, such as gap analysis results
June 12, 2014 59
Step 9 – Create Architecture Definition Document
• Document reasons for building block decisions in the
Architecture Definition Document
• Prepare the business sections of the Architecture
Definition Document
− A business footprint (a high-level description of the people and
locations involved with key business functions)
− A detailed description of business functions and their information
needs
− A management footprint (showing span of control and
accountability)
− Standards, rules, and guidelines showing working practices,
legislation, financial measures, etc.
− A skills matrix and set of job descriptions
June 12, 2014 60
TOGAF Steps For Data Dimension/View Analysis And
Design
June 12, 2014 61
Step 1 – Select Reference Models, Viewpoints, and Tools (1)
• Select relevant Data Architecture resources (reference models, patterns, etc.)
from the Architecture Repository, on the basis of the business drivers, and the
stakeholders and concerns
• Select relevant Data Architecture viewpoints (e.g., operations, management,
financial); i.e. those that will enable the architect to demonstrate how the
stakeholder concerns are being addressed in the Data Architecture
• Identify appropriate tools and techniques to be used for data capture, modeling,
and analysis
• Determine Overall Modelling Process
− For each viewpoint, select the models needed to support the specific view required,
using the selected tool or method
− Ensure that all stakeholder concerns are covered
− Collect data-related models from existing Business Architecture and Application
Architecture materials
− Rationalise data requirements and align with any existing organisation data catalogs
and models – this allows the development of a data inventor y and entity relationship
− Update and develop matrices across the architecture by relating data to business
service, business function, access rights, and application
− Elaborate Data Architecture views by examining how data is created, distributed,
migrated, secured, and archived
June 12, 2014 62
Step 1 – Select Reference Models, Viewpoints, and Tools (2)
• Identify Required Catalogs of Data Building Blocks
− Capture organisation’s data inventory as a catalog within the
Architecture Repository
− Create an inventory of the data needed to be in place to support
the Architecture Vision
− Refer to the Business Service/Information diagram created during
the Business Architecture phase, showing the key data entities
required by the main business services
− Consolidate the data requirements in a single location
− Refine the data inventory to achieve semantic consistency and to
remove gaps and overlaps
June 12, 2014 63
Step 1 – Select Reference Models, Viewpoints, and Tools (3)
• Identify Required Matrices
− Matrices show the core relationships between related model entities
− Form the raw material for development of diagrams and also act as a key
resource for impact assessment
− Understand how data is created, maintained, transformed, and passed to
other applications, or used by other applications
− Note gaps such as entities that never seem to be created by an application or
data created but never used
− Update and refine the architectural diagrams of how data relates to other
aspects of the architecture
− Suggested matrices
• Data Entity/Business Function (showing which data supports which functions and
which business function owns which data)
• Business Service/Information (developed during the Business Architecture phase)
• System/Data (developed across the Application Architecture and Data Architecture
phases)
June 12, 2014 64
Step 1 – Select Reference Models, Viewpoints, and Tools (4)
• Identify Required Diagrams
− Diagrams present the Data Architecture information from a set of
different perspectives according to the requirements of the
stakeholders
− Once the data entities have been refined, a diagram of the
relationships between entities and their attributes can be
produced
• Class diagram
• Data Dissemination diagram
• Data Lifecycle diagram
• Data Security diagram
• Data Migration diagram
• Class Hierarchy diagram
June 12, 2014 65
Step 1 – Select Reference Models, Viewpoints, and Tools (5)
• Identify Types of Requirement to be Collected
− Once the Data Architecture catalogs, matrices, and diagrams have
been developed, architecture modeling is completed by
formalising the business-focused requirements for implementing
the Target Architecture
− Types of requirement
• Functional requirements
• Non-functional requirements
• Assumptions
• Constraints
• Domain-specific Data Architecture principles
• Policies
• Standards
• Guidelines
• Specifications
June 12, 2014 66
Step 2 – Develop Data Business Architecture Description
• Develop a Baseline Description of the existing Data
Architecture, to the extent necessary to support the Target
Business Architecture
• Scope and level of detail to be defined will depend on the
extent to which existing data elements are likely to be
carried over into the Target Data Architecture
June 12, 2014 67
Step 3 – Develop Target Business Architecture Description
• Develop a Target Description for the Data Architecture, to
the extent necessary to support the Architecture Vision
• Scope and level of detail to be defined will depend on the
relevance of the business elements to attaining the Target
Architecture Vision
June 12, 2014 68
Step 4 – Perform Gap Analysis
• Verify the architecture models for internal consistency and accuracy
• Perform trade-off analysis to resolve conflicts (if any) among the
different views
• Validate that the models support the principles, objectives, and
constraints
• Test architecture models for completeness against requirements
• Identify gaps between the baseline and target
− Create gap matrix
− Identify building blocks to be carried over, classifying as either changed or
unchanged
− Identify eliminated building blocks
− Identify new building blocks
− Identify gaps and classify as those that should be developed and those that
should be procured
June 12, 2014 69
Step 5 – Define Roadmap Components
• Create a data business roadmap to prioritise activities over
the coming phases
• Initial Data Architecture roadmap will be used as raw
material to support more detailed definition of a
consolidated, cross-discipline roadmap within the
Opportunities and Solutions phase
June 12, 2014 70
Step 6 – Resolve Impacts Across the Architecture Landscape
• Understand any wider impacts or implications of proposed
Data Architecture
− Does this Data Architecture create an impact on any pre-existing
architectures?
− Have recent changes been made that impact on the Data
Architecture?
− Are there any opportunities to leverage work from this Data
Architecture in other areas of the organisation?
− Does this Data Architecture impact other projects (including those
planned as well as those currently in progress)?
− Will this Data Architecture be impacted by other projects
(including those planned as well as those currently in progress)?
June 12, 2014 71
Step 7 – Conduct Formal Stakeholder Review
• Check the original motivation for the architecture project
and the Statement of Architecture Work against the
proposed Data Architecture
• Is fit for the purpose of supporting subsequent work in the
other architecture domains?
• Identify any areas where the Solution and Application
Architecture may need to change to cater for changes in
the Data Architecture (or to identify constraints on the
Solution and Application Architecture about to be
designed)
• Refine the proposed Data Architecture but only if
necessary
June 12, 2014 72
Step 8 – Finalise the Data Architecture
• Select standards for each of the building blocks re-using as much as
possible from the reference models selected from the Architecture
Repository
• Document each building block
• Conduct final cross-check of overall architecture against business
goals
• Document reason for building block decisions in the architecture
document
• Document final requirements traceability report
• Document final mapping of the architecture within the Architecture
Repository and publish via the Architecture Repository
• Finalise all the work products, such as gap analysis results
June 12, 2014 73
Step 9 – Create Architecture Definition Document
• Document reasons for building block decisions in the
Architecture Definition Document
• Prepare Data Architecture sections of the Architecture
Definition Document
− Business data model
− Logical data model
− Data management process model
− Data Entity/Business Function matrix
− Data interoperability requirements
June 12, 2014 74
TOGAF Steps For Functional Dimension/View
Analysis And Design
June 12, 2014 75
Step 1 – Select Reference Models, Viewpoints, and Tools (1)
• Review and validate (or generate, if necessary) the set of application
principles
− Form part of an overarching set of architecture principles
• Select relevant Application Architecture resources (reference
models, patterns, etc.) from the Architecture Repository, on the
basis of the business drivers, and the stakeholders and concerns
• Select relevant Application Architecture viewpoints (for example,
stakeholders of the applications, viewpoints relevant to functional
and individual users of applications, etc.); i.e. those that will enable
the architect to demonstrate how the stakeholder concerns are
being addressed in the Application Architecture
• Identify appropriate tools and techniques to be used for data
capture, modeling, and analysis
• Consider using platform-independent descriptions of business logic
− Isolate the business logic from changes to the underlying platform and
implementation technology
June 12, 2014 76
Step 1 – Select Reference Models, Viewpoints, and Tools (2)
• Determine Overall Modeling Process
− For each viewpoint, select the models needed to support the
specific view required, using the selected tool or method
− Ensure that all stakeholder concerns are covered
− Process steps
• Understand the list of applications or application components that are
required, based on the baseline Application Portfolio, what the
requirements are, and the business architecture scope
• Identify logical applications and the most appropriate physical applications
• Develop matrices across the architecture by relating applications to
business service, business function, data, process, etc.
• Elaborate a set of Application Architecture views by examining how the
application will function, capturing integration, migration, development,
and operational concerns
− The level of granularity should be sufficient to enable
identification of gaps and the scope of candidate work packages
June 12, 2014 77
Step 1 – Select Reference Models, Viewpoints, and Tools (3)
• Identify Required Catalogs of Application Building Blocks
− Capture organisation’s Application Portfolio as a catalog within
the Architecture Repository
• Application Portfolio catalog
• Interface catalog
June 12, 2014 78
Step 1 – Select Reference Models, Viewpoints, and Tools (4)
• Identify Required Matrices
− Matrices show the core relationships between related model entities
− Form the raw material for development of diagrams and also act as a key resource for
impact assessment
− Once the baseline Application Portfolio has been assembled, it is necessary to map the
applications to their purpose in supporting the business
• Initial mapping should focus on business services within the Business Architecture
− Once applications are mapped to business services, it will also be possible to make
associations from applications to data
• Refer to Phase C1: Information Systems Architectures – Data Architecture
− Identify user and organisational dependencies on applications
− Specifically consider the operational support business unit
− Update and refine the architectural diagrams of how data relates to other aspects of
the architecture
− Examine application dependencies on shared operations capabilities and produce a
diagram on how each application is effectively operated and managed
− Suggested matrices
• System/Business Unit matrix
• Role/System matrix
• Application Interaction matrix
• System/Function matrix
June 12, 2014 79
Step 1 – Select Reference Models, Viewpoints, and Tools (5)
• Identify Required Diagrams
− Diagrams present the Application Architecture information from a set of
different perspectives according to the requirements of the stakeholders
− Once the desired functionality of an application is known, it is necessary to
perform an internal assessment of how the application should be best
structured to meet its requirements
• Packaged applications
− Numbers of configuration options, add-on modules
• Custom developed applications
− Identify the high-level structure of the application in terms of modules or sub-
systems as a foundation to organise design activity
− Once the application entities have been refined, a diagram of the relationships
between entities and their attributes can be produced
• Application Communication diagram
• Application and User Location diagram
• Enterprise Manageability diagram
• Process/System Realisation diagram
• Application Migration diagram
• Software Distribution diagram
• Software Engineering diagram
June 12, 2014 80
Step 1 – Select Reference Models, Viewpoints, and Tools (6)
• Identify Types of Requirement to be Collected
− Once the Application Architecture catalogs, matrices, and
diagrams have been developed, architecture modeling is
completed by formalising the application-focused requirements
for implementing the Target Architecture
− Types of requirement
• Functional requirements
• Non-functional requirements
• Assumptions
• Constraints
• Domain-specific Application Architecture principles
• Policies
• Standards
• Guidelines
• Specifications
June 12, 2014 81
Step 2 – Develop Application Business Architecture
Description
• Develop a Baseline Description of the existing Application
Architecture, to the extent necessary to support the Target
Business Architecture
• Scope and level of detail to be defined will depend on the
extent to which existing data elements are likely to be
carried over into the Target Application Architecture
June 12, 2014 82
Step 3 – Develop Target Application Architecture Description
• Develop a Target Description for the Application
Architecture, to the extent necessary to support the
Architecture Vision, Target Business Architecture, and
Target Data Architecture
• Scope and level of detail to be defined will depend on the
relevance of the business elements to attaining the Target
Architecture Vision
June 12, 2014 83
Step 4 – Perform Gap Analysis
• Verify the architecture models for internal consistency and
accuracy
• Test architecture models for completeness against
requirements
• Identify gaps between the baseline and target
− Create gap matrix
− Identify building blocks to be carried over, classifying as either
changed or unchanged
− Identify eliminated building blocks
− Identify new building blocks
− Identify gaps and classify as those that should be developed and
those that should be procured
June 12, 2014 84
Step 5 – Define Roadmap Components
• Create an application business roadmap to prioritise
activities over the coming phases
• Initial Application Architecture roadmap will be used as
raw material to support more detailed definition of a
consolidated, cross-discipline roadmap within the
Opportunities and Solutions phase
June 12, 2014 85
Step 6 – Resolve Impacts Across the Architecture Landscape
• Understand any wider impacts or implications of proposed
Application Architecture
− Does this Application Architecture create an impact on any pre-
existing architectures?
− Have recent changes been made that impact on the Application
Architecture?
− Are there any opportunities to leverage work from this
Application Architecture in other areas of the organisation?
− Does this Application Architecture impact other projects
(including those planned as well as those currently in progress)?
− Will this Application Architecture be impacted by other projects
(including those planned as well as those currently in progress)?
June 12, 2014 86
Step 7 – Conduct Formal Stakeholder Review
• Check the original motivation for the architecture project
and the Statement of Architecture Work against the
proposed Application Architecture
• Identify any areas where the where the Business and Data
Architectures (e.g., business practices) may need to
change to cater for changes in the Application Architecture
(for example, changes to for ms or procedures, application
systems, or database systems)
• Identify any constraints on the Technology Architecture
(especially the infrastructure) about to be designed
June 12, 2014 87
Step 8 – Finalise the Application Architecture
• Select standards for each of the building blocks re-using as much as
possible from the reference models selected from the Architecture
Repository
• Document each building block
• Conduct final cross-check of overall architecture against business
goals
• Document reason for building block decisions in the architecture
document
• Document final requirements traceability report
• Document final mapping of the architecture within the Architecture
Repository and publish via the Architecture Repository
• Finalise all the work products, such as gap analysis results
June 12, 2014 88
Step 9 – Create Architecture Definition Document
• Document reasons for building block decisions in the
Architecture Definition Document
• Prepare Application Architecture sections of the
Architecture Definition Document
June 12, 2014 89
TOGAF Steps For Technical Dimension/View Analysis
And Design
June 12, 2014 90
Step 1 – Select Reference Models, Viewpoints, and
Tools (1)
• Review and validate the set of technology principles
• Select relevant Technology Architecture resources
(reference models, patterns, etc.) from the Architecture
Repository
• Select relevant Technology Architecture viewpoints that
will enable the architect to demonstrate how the
stakeholder concerns are being addressed in the
Technology Architecture
• Identify appropriate tools and techniques to be used for
capture, modeling, and analysis, in association with the
selected viewpoints
June 12, 2014 91
Step 1 – Select Reference Models, Viewpoints, and
Tools (2)
• Determine Overall Modelling Process
− For each viewpoint, select the models needed to support the
specific view required, using the selected tool or method
− Develop a Technology Architecture
• Define a classification of platform services and logical technology
components (including standards)
• Identify relevant locations where technology is deployed
• Carr y out a physical inventor y of deployed technology and abstract up to
fit into the classification
• Look at application and business requirements for technology
• Is the technology in place fit-for-purpose to meet new requirements
• Deter mine configuration of the selected technology
• Determine impact
− Sizing and costing
− Capacity planning
− Installation/governance/migration impacts
June 12, 2014 92
Step 1 – Select Reference Models, Viewpoints, and
Tools (3)
• Determine Overall Modelling Process
− Technology Architecture may be impacted by earlier decisions made around
service granularity/level of detail and service boundaries
• Performance – Coarse-grained services contain several units of functionality with
potentially varying nonfunctional requirements, so platform performance should be
considered
• Maintainability – If service granularity is too coarse, then introducing changes to
that ser vice becomes difficult and impacts the maintenance of the service and the
platform on which it is delivered
• Location and Latency – Services might interact with each other over remote links
and inter-service communication will have in-built latency
• Availability – Service invocation is subject to network and/or service failure so high
communication availability is an important consideration during service
decomposition and defining service granularity
− Product selection processes may occur within the Technology Architecture
phase where existing products are re-used, incremental capacity is being
added, or product selection decisions are a constraint during project initiation
− Where product selection deviates from existing standards, involves significant
effort, or has wide-ranging impact, this activity should be flagged as an
opportunity and addressed through the Opportunities and Solutions phase
June 12, 2014 93
Step 1 – Select Reference Models, Viewpoints, and
Tools (4)
• Identify Required Catalogs of Technology Building Blocks
− Catalogs are inventories of the core assets of the business
− Catalogs for m the raw material for development of matrices and diagrams and
also act as a key resource for portfolio managing business and IT capability
− Based on existing technology catalogs and analysis of applications carried out
in the Application Architecture phase, collect a list of products in use
− If the requirements identified in the Application Architecture are not met by
existing products, extend the product list by examining products available on
the market that provide the functionality and meet the required standards
− If technology standards are currently in place, apply these to the technology
component catalog to gain a baseline view of compliance with technology
standards
− Create catalogs
• Technology standards
• Technology portfolio
June 12, 2014 94
Step 1 – Select Reference Models, Viewpoints, and
Tools (5)
• Identify Required Matrices
− Matrices show the core relationships between related model
entities
− Create System/Technology matrix
June 12, 2014 95
Step 1 – Select Reference Models, Viewpoints, and
Tools (6)
• Identify Required Diagrams
− Diagrams present the Technology Architecture information from a set of different
perspectives (viewpoints) according to the requirements of the stakeholders
• Provide a link between platform requirements and hosting requirements
− For major baseline applications or application platforms (where multiple applications
are hosted on the same infrastructure stack), produce a stack diagram showing how
hardware, operating system, software infrastructure, and packaged applications
combine
− For each environment, produce a logical diagram of hardware and software
infrastructure showing the contents of the environment and logical communications
between components
• Where available, collect capacity information on the deployed infrastructure
− For each environment, produce a physical diagram of communications infrastructure,
such as routers, switches, firewalls, and network links
• Where available, collect capacity information on the communications infrastructure
− Create diagrams
• Environments and Locations diagram
• Platform Decomposition diagram
• Processing diagram
• Networked Computing/Hardware diagram
• Communications Engineering diagram
June 12, 2014 96
Step 1 – Select Reference Models, Viewpoints, and
Tools (7)
• Identify Types of Requirement to be Collected
− Once the Technology Architecture catalogs, matrices, and diagrams have been
developed, architecture modeling is completed by formalising the data-
focused requirements for implementing the Target Architecture
− Identify types of requirement that must be met by the architecture
implementation
• Functional requirements
• Non-functional requirements
• Assumptions
• Constraints
• Domain-specific Technology Architecture principles
• Policies
• Standards
• Guidelines
• Specifications
June 12, 2014 97
Step 1 – Select Reference Models, Viewpoints, and
Tools (8)
• Select Services
− Services portfolios are combinations of basic services from the
service categories in the Technical Reference Model that do not
conflict
• Requirements for organisation-specific elements or pre-existing decisions
• Pre-existing and unchanging organisational elements
• Inherited external environment constraints
− For each building block, build up a service description portfolio as
a set of non-conflicting ser vices
− Set of services must be tested to ensure that the functionality
provided meets application requirements
June 12, 2014 98
Step 2 – Develop Baseline Business Architecture
Description
• Develop a Baseline Description of the existing Technology
Architecture to the extent necessary to support the Target
Technology Architecture
• Scope and level of detail to be defined will depend on the extent to
which existing business elements are likely to be carried over into
the Target Business Architecture
• Identify the relevant Technology Architecture building blocks,
drawing on any artifacts held in the Architecture Repository
• Convert the description of the existing environment into the terms
of the organisation’s Foundation Architecture
• Set down a list of key questions which can be used later in the
development process to measure the effectiveness of the new
architecture
• Use the models identified within Step 1 of Phase D as a guideline for
creating new architecture content to describe the Baseline
Architecture
June 12, 2014 99
Step 3 – Develop Target Technology Architecture
Description
• Develop a Target Description for the Technology Architecture, to the
extent necessary to support the Architecture Vision, Target Business
Architecture, and Target Information Systems Architecture
• Scope and level of detail to be defined will depend on the relevance
of the business elements to attaining the Target Architecture Vision
• Process in the creation of a broad architectural model of the target
system is the conceptualisation of building blocks
• Architecture Building Blocks (ABBs) describe the functionality and
how they may be implemented without the detail introduced by
configuration or detailed design
• Where new architecture models need to be developed to satisfy
stakeholder concerns, use the models identified within Step 1 of
Phase D as a guideline for creating new architecture content to
describe the Target Architecture
June 12, 2014 100
Step 4 – Perform Gap Analysis
• Verify the architecture models for internal consistency and accuracy
• Note changes to the viewpoint represented in the selected models
from the Architecture Repository
• Test architecture models for completeness against requirements
• Identify gaps between the baseline and target
− Create gap matrix
− Identify building blocks to be carried over, classifying as either changed or
unchanged
− Identify eliminated building blocks
− Identify new building blocks
− Identify gaps and classify as those that should be developed and those that
should be procured
June 12, 2014 101
Step 5 – Define Roadmap Components
• Create a business roadmap to prioritise activities over the
coming phases
• Initial Technology Architecture roadmap will be used as
raw material to support more detailed definition of a
consolidated, cross-discipline roadmap within the
Opportunities and Solutions phase
June 12, 2014 102
Step 6 – Resolve Impacts Across the Architecture
Landscape
• Understand any wider impacts or implications of proposed
Technology Architecture
− Does this Technology Architecture create an impact on any pre-
existing architectures?
− Have recent changes been made that impact on the Technology
Architecture?
− Are there any opportunities to leverage work from this
Technology Architecture in other areas of the organisation?
− Does this Technology Architecture impact other projects
(including those planned as well as those currently in progress)?
− Will this Technology Architecture be impacted by other projects
(including those planned as well as those currently in progress)?
June 12, 2014 103
Step 7 – Conduct Formal Stakeholder Review
• Check the original motivation for the architecture project
and the Statement of Architecture Work against the
proposed Technology Architecture
• Is fit for the purpose of supporting subsequent work in the
other architecture domains?
• Refine the proposed Technology Architecture but only if
necessary
June 12, 2014 104
Phase Step 8 – Finalise the Business Architecture
• Select standards for each of the building blocks re-using as much as
possible from the reference models selected from the Architecture
Repository
• Document each building block
• Conduct final cross-check of overall architecture against business
goals
• Document reason for building block decisions in the architecture
document
• Document final requirements traceability report
• Document final mapping of the architecture within the Architecture
Repository and publish via the Architecture Repository
− From the selected building blocks, identify those that might be re-used
(working practices, roles, business relationships, job descriptions, etc.),
• Finalise all the work products, such as gap analysis results
June 12, 2014 105
Step 9 – Create Architecture Definition Document
• Document reasons for building block decisions in the Architecture
Definition Document
• Prepare the business sections of the Architecture Definition
Document
− Fundamental functionality and attributes – semantic, unambiguous including
security capability and manageability
− Dependent building blocks with required functionality and named interfaces
− Interfaces – chosen set, supplied (APIs, data for mats, protocols, hardware
interfaces, standards)
− Map to business/organisational entities and policies
• Use reports and/or graphics generated by modeling tools to
demonstrate key views of the architecture
• Route the document for review by relevant stakeholders and
incorporate feedback
June 12, 2014 106
Summary
• The role of solution architecture is to identify answer to a business
problem and set of solution options and their components
• There will be many potential solutions to a problem with varying
suitability
• Solution options are derived from a combination of Solution
Architecture Dimensions/Views which describe characteristics,
features, qualities, requirements and Solution Design Factors,
Limitations And Boundaries which delineate limitations
• Use structured approach to assist with solution design to create
consistency
• TOGAF approach to enterprise architecture can be adapted to
perform analysis and design for elements of Solution Architecture
Dimensions/Views
• Solution architecture is part of the continuum from business
problem to operable solution
June 12, 2014 108
More Information
Alan McSweeney
http://ie.linkedin.com/in/alanmcsweeney