When is an exception flow recommended to be modeled?

Modeling an exception flow is recommended during an overview process evaluation because this is the stage where one can gain a comprehensive understanding of the primary process and identify potential points of failure or deviations from the norm. By evaluating the entire process, it becomes evident where exceptions might arise, allowing for proactive design of alternate paths to handle those scenarios effectively. This step is crucial for ensuring that the system can manage unexpected events without compromising the overall workflow.

Identifying exception flows at this stage helps to create a robust process design that anticipates possible issues, thereby enhancing efficiency and user experience. Setting up exception flows is about anticipating how the process will respond when things don't go as planned, making it essential to embed these considerations from the initial evaluation of the process flow.

In contrast, other scenarios such as modeling exception flows in all situations, only in live environments, or through comprehensive project maps, do not account for the necessary analytical step of assessing the process in its entirety before implementation. They may miss the opportunity to define exception paths effectively, which ideally should be recognized during the initial process overview.