Use Case Builder
Build a complete use-case specification from system context and actors through preconditions, trigger, main success scenario, alternate and exception flows, postconditions, business rules and final quality review.
Describe How an Actor Achieves a Goal Through the System.
A use case structures functional behavior around an actor goal. It identifies the system boundary, actors, entry conditions, normal interaction, meaningful variations, completion conditions and governing rules.
- Define one clear actor goal and system boundary.
- Distinguish primary and supporting actors.
- Separate preconditions from interaction steps.
- Write the main success scenario in observable actor-system terms.
- Add alternate and exception flows where they materially affect behavior.
Use Case Builder — Step by Step
Eight locked stages build the specification from context and actors through entry conditions, main flow, variations, business rules and final validation.
Establish the Use Case Context
Submit Customer Onboarding Application
Establish the use-case context before defining actors and flows.
Use Case Specification Register
The supporting register keeps the final flow, variations and business rules available outside the guided demonstration.
Build a Simple Use Case Summary
Experiment Mode is isolated from the guided example. Define an actor, goal, trigger and success outcome to create a custom use-case summary.
Quick Knowledge Check
Core Use Case Elements
Goal & Actors
Define the actor goal and distinguish the primary actor from supporting external actors.
Preconditions & Trigger
State what must already be true and the event that starts the interaction.
Flows
Write the main success scenario first, then meaningful alternate and exception flows.
Completion
State success/failure postconditions and link material business rules to the behavior.