Actor vs. Instances

• What is the difference between an actor and a class and an instance?

• Actor:

  An entity outside the system to be modeled, interacting with the system (“Pilot”)
  

• Class:

  An abstraction modeling an entity in the problem domain, inside the system to be modeled (“Cockpit”)
  

• Object:

  A specific instance of a class (“Joe, the inspector”).
  

Previous slide

Next slide

Back to first slide

View graphic version