Use case techniques for eliciting requirements - Project management (PMP)

Describe use case techniques for eliciting requirements.

A use case approach defines what a system will do from a user’s perspective. They provide a detailed description of a particular user requirement and are structured. Some of the concepts related and involved in a use case are:

Actor: Any external force that interacts with the system. However, it is not part of the system itself.

The use case provides description of a function from an actor’s perspective. Some steps for writing use cases:
a) Identify users of the system
b) Pick an actor
c) Define what the actor wants to do, which becomes a use case
d) For each use case identify what is to be done
e) Describe basic steps
f) Describe alternative paths
g) Repeat for different actors
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