Here are the stages and gates in Cooper’s stage gate product development process. Stage 0: Discovery
Gate 1: Initial Screen Stage 1: Scoping
Gate 2: Second Screen Stage 2: Build Business Case
Gate 3: Go to Development Stage 3: Development
Gate 4: Go to Testing Stage 4: Testing and Validation
Gate 5: Go to Launch Stage 5: Launch
Gate 6: Post-Launch Review