Architecture Review Checklist: What a Thorough Review Should Cover

Architecture reviews vary enormously in quality. A review that focuses only on the design of the proposed solution misses half the risk. A review that generates a long list of theoretical concerns without distinguishing significant from minor risks is not useful. A thorough architecture review answers a specific set of questions about whether the proposed approach is appropriate for its context, and it does so in a way that the project team can act on.

The first area is fitness for purpose. Does the proposed architecture meet the functional and non-functional requirements? Non-functional requirements are where architectural problems most often originate: performance under load, availability targets, recovery time objectives, data volume projections, and concurrent user expectations. If these requirements have not been formally defined, the review should surface that gap rather than assume they are being addressed.

Integration risk is the second major area. Most architecture failures in complex organisations are not failures of the core system in isolation; they are failures at the points where systems connect. The review should identify every integration point in the proposed design, assess the maturity and reliability of each integration mechanism, and determine whether the data flows across those integrations are well-understood and governed. Integration assumptions that are not validated are the most common source of scope escalation during implementation.

Security architecture should be reviewed at the design stage, not after implementation. Key questions include: where does authentication and authorisation occur, how is sensitive data protected in transit and at rest, what is the attack surface of the proposed design, and how does the proposed approach align with the organisation's security standards and regulatory obligations. Security concerns identified during design are orders of magnitude cheaper to address than those identified in testing or production.

Scalability and maintainability are forward-looking concerns. The review should assess whether the proposed architecture will remain appropriate as the organisation's requirements grow, and whether it can be maintained by the team that will own it after initial delivery. Technical choices that are appropriate at current scale but will require significant rework at two or three times the current volume create future liability. Technology stacks that the organisation does not have the capability to maintain create dependency on the original implementation team.

Strategic alignment is the final dimension. The review should assess whether the proposed architecture is consistent with the organisation's agreed technology standards, preferred platforms, and target architecture direction. Proposals that introduce new technology dependencies without explicit justification, adopt platforms that are not on the approved list, or create integration patterns that conflict with the agreed integration strategy should be assessed for their long-term implications, not just their immediate fit for the project at hand.