Software Architect's Handbook

Step 3 – Classify and prioritize scenarios

Each scenario that is created in Step 1 – Develop scenarios, is classified and prioritized in this step. Scenarios can either be direct or indirect scenarios. If the software system does not require any modifications to perform the scenario, it can be classified as a direct scenario. If the scenario is not directly supported, meaning that some change has to be made to the software system for the scenario, then it is an indirect scenario.

Once scenarios have been classified, they should be prioritized based on importance. This can be accomplished by using some type of voting procedure. The scenarios that are determined to be of highest priority to the review team as a whole can be used for the evaluation. ...