Requirements Modeling Skill

Purpose

Use visual models to clarify and analyze requirements. "A picture is worth 1000 words" - specifically for complex logic and relationships.

When to Use

• Complex logic (State diagrams).
• System interactions (Sequence diagrams).
• Data relationships (Class/ERD diagrams).
• User decisions (Activity diagrams).

Key Modeling Techniques (UML & Others)

1. State Machine Diagram (State Transition)

Use: Object has a complex lifecycle (e.g., Order Status). Elements: States (Rounded Rect), Transitions (Arrows), Events/Triggers.