Phase G · Implementation GovernanceTGF-PG · theory

Source · TOGAF Standard, 10th Edition — ADM: Phase G

Why this matters

ADM — Phase G

A perfect architecture is worthless if what gets built drifts from it. Phase G — Implementation Governance provides architectural oversight of the implementation, making sure the delivered solution conforms to the target architecture.

The concept

Phase G §Objectives

Phase G ensures conformance of implementation projects with the architecture, via the Architecture Contract — a signed agreement between development partners and sponsors on deliverables, quality and fitness-for-purpose. It performs compliance reviews as solutions are built.

Architecture Contract & compliance

Phase G §Steps

The Architecture Contract governs the overall implementation and deployment process. Phase G conducts Architecture Compliance reviews (levels: irrelevant, consistent, compliant, conformant, fully conformant, non-conformant) and issues a Compliance Assessment. It's where architecture and project/solution delivery meet.

How it connects

ADM flow

Phase G governs delivery against the plan from Phase F, using governance capability set up in Preliminary. Change requests arising during implementation may flow to Phase H.

Common traps
  • Phase G governs the implementation/build — it doesn't build; it ensures conformance.
  • The Architecture Contract is the key Phase G instrument (deliverables, quality, fitness).
  • Don't confuse Phase G (govern this implementation) with Phase H (manage changes after deployment).
Key takeaways
  • Phase G provides architectural oversight of implementation for conformance.
  • Uses Architecture Contracts and compliance reviews.
  • Governance capability comes from Preliminary; changes may trigger Phase H.