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Suppose there are two use cases A and B. Is the below scenario even possible: 

A includes B and at the same time B extends A?

Can someone explain this please?

sakshi
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1 Answers1

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A includes B and at the same time B extends A is not possible.

A includes B means that usecase B is always included during usecase A. B is a mandatory part of A.

B extends A means that usecase A may (or may not) be extended by usecase B. A is the core/main/principal usecase and B is one possible addition of A but it is not mandatory.

Hoping it is clear....

Red Beard
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  • Suppose there is a functionality that is at one point mandatory (say, at the initial point of the app) but then later it is optional. How can we represent this? – Silidrone May 31 '23 at 09:39