Entry Criteria (Precondition)
Conditions to be met before a specific activity begins. Entrance criteria are most effective when the are aligned with the significant risks associated with starting the activity when the criteria have not been met, i.e.:
- The supporting infrastructure within which a system operates.
- The related systems with which a system interfaces.
A textual description defining a constraint on the system when a use case may start.
A constraint that must be true when an operation is invoked.