Although DMN's expression language FEEL was designed to be business-friendly, it remains intimidating to many. That has led to the oft-heard charge that "DMN is too hard for business users". That's not true, at least for those willing to learn how to use it. Although the Microsoft Excel Formula language is actually less business-friendly than FEEL, somehow you never hear that "Excel is too hard for business users." One key reason why FEEL is more business-friendly than the Excel Formula language, which they now call Power FX, is its operators.