What might lead to a 'Discontinue Step' milestone?

A 'Discontinue Step' milestone signals that a particular step in a process has encountered a significant issue that prevents it from continuing. When a step's stage encounters an error, it indicates that the conditions necessary for the next step to proceed cannot be met, thereby necessitating a halt in the orchestration.

The occurrence of an error means that either the expected outcomes were not achieved, or critical dependencies were not satisfied, which could compromise the integrity of the overall process. This leads to the decision to discontinue further execution to avoid unintended consequences, allowing for analysis and correction of the errors before attempting to re-trigger the process.

In contrast, when a step's stage completes without errors or executes successfully, it signifies that the process can move forward, making it unnecessary to invoke a 'Discontinue Step' milestone.