Entry Criteria (Precondition)

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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.:

Environment

• 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.

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