The seminar administrator reviewed these three diagrams and asked the BA to create a fourth diagram to model the various levels that a trainee goes through (e.g., white belt to yellow belt yellow…

Decision modeling represents the logic and rules behind business decisions using decision tables or DMN notation, not the lifecycle states of an entity.

A State Diagram (state machine diagram) models the distinct states an object or entity can occupy and the events or conditions that trigger transitions between those states. Modeling a trainee moving from white belt to yellow belt to green belt is precisely this pattern - each belt is a state, and advancement criteria are transitions. This directly maps to the state modeling technique.

Concept modeling (conceptual diagrams or domain models) captures the relationships between business concepts and entities, not the sequential states an entity progresses through.

Organizational modeling depicts the structure, roles, and reporting relationships of an organization, not the state transitions of an individual entity.