Stage-Gate Process
Also known as: Phase-Gate
Cooper's product-development model with go/kill decisions between defined stages.
The Stage-Gate Process, developed by Robert Cooper through field research in the 1980s and presented in Winning at New Products (1986, with subsequent editions), structures product development as a sequence of cross-functional stages — typically Discovery, Scoping, Build Business Case, Development, Testing & Validation, and Launch — separated by gates at which a governance body (a Gatekeeping team) decides Go, Kill, Hold, or Recycle based on quality of execution, business case strength, and resource availability. The framework's core analytical contribution is making product development resource-allocation decisions explicit and disciplined rather than allowing projects to proceed by inertia, with gate criteria defined ex ante so that decisions can be made on consistent grounds. Stage-Gate became the dominant product-development framework in established corporations from the 1990s onward, with subsequent versions (Stage-Gate Lite, Stage-Gate XPress, Stage-Gate TD) addressing critiques about excessive bureaucracy and slowness. The framework sits in productive tension with Lean Startup approaches.
Core components
- Stages: Discovery
- Scoping
- Build Business Case
- Development
- Testing & Validation
- Launch (canonical 5-stage variant)
- Gates between stages with Go/Kill/Hold/Recycle decisions
- Gatekeeper team and gate criteria
- Cross-functional stage execution
- Quality of Execution criteria
- Stage-Gate Lite, XPress, TD variants for different risk profiles
- Pairs with portfolio management
Primary use case
New product development at established corporations, particularly in consumer products, pharmaceuticals, chemicals, and industrial goods; structuring innovation portfolios; basis for cross-functional product-development governance.
Common criticisms
- Pace can be too slow for fast-moving software and digital products
- gate bureaucracy can substitute for genuine analysis
- gate criteria gaming and politically protected projects undermine the discipline
- biased toward incremental product extensions over breakthrough innovation (gate criteria often favor measurable near-term opportunities)
- tension with agile and lean-startup approaches
- can deteriorate into compliance ritual
- works less well in hardware-software combined products where iteration cycles differ
- commercial certification and consulting through Stage-Gate International limits independent assessment.
Lineage
- Siblings
- Lean Startup, DMADV, Three Horizons Model