Summary

A scenario is a tool for telling a story. We have discussed how to write scenarios for both the story of the business use case and the story of the product use case.

The business use case scenario is intended to help you and your stakeholders come to a coherent understanding of the business rules that apply to a specific business event. Writing the scenario tests whether sufficient trawling has been done, and whether the requirements analyst needs to ask more questions and investigate further.

The product use case scenario specifies the boundary or scope of the product for a specific business use case. Constraints, goals, and technical and business guidance are necessary input for defining the product use case boundary.

You can use a very similar form of scenario for the business use case and the product use case, providing (for the purposes of communication and traceability) you make it clear which one is which.