A brick factory uses a single oven to fire batches of bricks. There are several orders specifying how many batches of bricks it requires per day and how many days they should be fired. The oven’s batch capacity is not constant — it varies over time. At every point in time, the total number of batches from all orders running concurrently must not exceed the oven’s available capacity at that moment. You need to create a decision model that schedules each of the orders so that the oven’s time-varying capacity is never exceeded. Link