The mistake made in capturing these acceptance criteria was that they include solution information instead of focusing on what needs to be achieved by implementing this feature or functionality. For example, specifying that "a service manager can click a Reassign button" implies a particular design choice rather than describing what outcome should be achieved by reassigning cases (such as transferring ownership or notifying new owners). Acceptance criteria should be aligned with the user's goal rather than prescribing how to achieve it so that they do not limit creativity or innovation in finding solutions. Acceptance criteria should also be small and testable so that they can be easily verified by using techniques such as scenarios or test cases. References:
1 https://trailhead.salesforce.com/en/content/learn/modules/salesforce-business-analyst-certification-prep/user- stories