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ENABLE PEER REVIEW OF CHANGES Instead of requiring approval from an external body prior to deployment, we may require engineers to get peer reviews of their changes. In Development, this practice has been called code review, but it is equally applicable to any change we make to our applications or environments, including servers, networking, and databases.++ The goal is to find errors by having fellow engineers close to the work scrutinize our changes. This review improves the quality of our changes, which also creates the benefits of cross-training, peer learning, and skill improvement.