E- Entry Criteria

T- Task

V- Validation

X- Exit Criteria

ENTRY CRITERIA: Input with 'condition' attached.

e.g. Approved SRS document is the entry criteria for the design phase.

TASK: Procedures.

e.g. Preparation of HLD, LLD etc.

VALIDATION: Building quality & Verification activities

e.g. Technical reviews

EXIT CRITERIA: Output with 'condition' attached.

e.g Approved design document

It is important to follow ETVX concept for all phases in SDLC.