The project team is working on test scripts to test a solution.

 A use case is a technique that describes how an actor interacts with a system to achieve a goal or perform a task. A use case consists of a main scenario and possible alternative scenarios that capture the normal, exceptional, and error flows of events. A use case can be used as a source for building tests of end-to-end business processes across business functions and systems, as it provides a comprehensive and realistic view of the expected behavior and outcomes of the solution. A use case can also help to verify and validate the functional requirements and acceptance criteria of the solution. References: PMI Professional in Business Analysis (PMI-PBA)® Examination Content Outline1, page 20; Business Analysis for Practitioners: A Practice Guide2, page 99.