A change and architecture review sounds like process for its own sake until you've seen what it actually catches: not incompetence, but the reasonable blind spots that come from being close to a decision. Someone designing a network change, a permission model or an infrastructure update is focused on making it work — a second, less invested reviewer is better positioned to ask what happens when it doesn't.
The most common category of catch is scope creep in permissions: a change that grants broader access than the stated requirement actually needs, because the narrower, more precise version would have taken more design time to get right. Reviewed early, that's a five-minute conversation. Discovered later, during a security audit or after an incident, it's a much larger remediation.
The second common catch is a change that solves the immediate problem while quietly creating a dependency or a single point of failure somewhere else in the environment — a reasonable trade-off if it's a conscious decision, and a latent risk if nobody noticed it was being made.
The value of review is highest exactly where it feels least necessary: routine-seeming changes made under time pressure, where the person making the change is confident precisely because they've made similar changes before and hasn't had time to consider what's different this time.
The review doesn't need to be heavyweight to be valuable. A brief, regular cadence where planned changes get a second set of experienced eyes before they ship catches a meaningful share of the mistakes that would otherwise only surface as an incident — which is the entire point of doing it before, rather than after.
All technical perspectives