Primary and Secondary Use Case Actors

This blog post discusses the role of primary and secondary actors in UML use cases. Primary Actors are actor(s) using the system to achieve a goal. The Use Case documents the interactions between the system and the actors to achieve the goal of the primary actor. Secondary Actors are actors that the system needs assistance from to achieve the primary actor’s goal. Additional references about Primary and Secondary Use Case Actors

Guideline: Find and Outline Actors and Use Cases

Identifying Actors in Use Case Diagrams

Types of Actor in a Use Case Model

What is the difference between a Primary and Secondary Actor in Use Case Modeling?