G1 · Commit

Source

Stage-Gate®; PRINCE2® stage boundaries; ISO 21502 governance

Level

B · established practice

Evidence

Checks

• Delivery approach chosen and recorded
• Contract model fits the uncertainty: fixed price only for clear or complicated scope, or after a paid discovery
• Regulatory obligations listed in the SOW assumptions and priced
• Service levels agreed in the SOW: hours, priorities, response and resolution times

How the gate runs

Predictive

Phase gate: held once, at the end of the stage.

Agile (iterative)

Rolling gate: held per release; item readiness via Definition of Ready, completion via Definition of Done.

Flow (Kanban)

Policy gate: explicit exit policies on the board columns, applied to every item.

Hybrid

Phase gate per phase, with iterations or flow inside the phase.