Deployment Strategy Blue Green

Trigger Boundary

• •Use when release safety, deployment sequencing, or rollback controls are required.
• •Do not use for business-priority ranking of requirements; use requirement-prioritization.
• •Do not use for runtime incident retrospectives; use incident-postmortem.

Goal

Deliver changes safely with repeatable, auditable release mechanics.

Inputs

• •Change scope and risk profile
• •Domain evidence for blue-green cutover safety and fast rollback readiness
• •Operational, compliance, and rollout constraints

Outputs

• •Blue-green deployment runbook
• •Decision log for blue-green cutover safety and fast rollback readiness
• •Verification checklist with measurable pass-fail criteria

Workflow

1. •Clarify outcomes and hard constraints for blue-green cutover safety and fast rollback readiness.
2. •Produce options and select an approach for blue-green cutover safety and fast rollback readiness.
3. •Evaluate trade-offs across security, performance, operability, and maintainability.
4. •Verify decisions using switch-over rehearsal with rollback timing evidence.
5. •Publish decisions, residual risks, and accountable follow-up actions.

Quality Gates

• •Scope and assumptions for blue-green cutover safety and fast rollback readiness are explicit and reviewable.
• •Decision rationale is backed by evidence instead of preference.
• •Rollout and rollback criteria are defined when production impact exists.
• •Residual risks have owners, due dates, and verification steps.

Failure Handling

• •Stop when cutover cannot be reversed within operational limits.
• •Escalate when accepted risk exceeds team policy thresholds.