The OODA Loop: Speed Up Your Code Review Process
The OODA loop can transform your code review process. Learn how to apply this military mental model to improve developer productivity and ship faster.
I used to think code reviews were just a quality gate—a place where I’d dump my thoughts, find every missing semicolon, and feel like I’d done my job. In reality, I was just creating a bottleneck. My feedback was often slow, inconsistent, and frankly, demoralizing for the junior devs on my team. It wasn't until I started viewing the code review process through the lens of John Boyd’s OODA loop that I realized why we were stalling.
Boyd, a military strategist, designed the OODA loop (Observe, Orient, Decide, Act) to help fighter pilots make better decisions faster than their adversaries. In software, our "adversary" isn't a pilot; it’s the complexity of the codebase and the friction of stale pull requests.
Understanding the OODA Loop in Code Reviews
The OODA loop is about cycling through information rapidly. If you linger too long in the "Observe" phase, you’re just reading code without context. If you rush to "Act" without "Orienting," you leave comments that lack empathy or technical depth.
| Phase | Developer Action | Goal |
|---|---|---|
| Observe | Scan the PR diff and CI logs | Raw data intake |
| Orient | Map changes to business requirements | Contextual understanding |
| Decide | Formulate clear, actionable feedback | Eliminate ambiguity |
| Act | Submit comments or approve | Close the loop |
Observe: Don't Just Read, Scan
When a PR lands, most of us dive straight into the code. That’s a mistake. You need to observe the environment first. Check the CI status, look at the JIRA ticket, and understand the why behind the change. If the tests are failing, don't waste time reviewing logic—that’s a broken observation. Use your time to identify the "hot paths" that actually matter, similar to how we prioritize tasks using The Pareto Principle in Refactoring: Taming Your Technical Debt.
Orient: Where Mental Models Shine
Orientation is the most critical phase. This is where you connect the incoming code to your existing Mental models for software engineering to build better systems. Are you looking at a standard implementation, or is this a leaky abstraction? When you orient correctly, you stop nitpicking and start mentoring. You aren't just judging the code; you’re aligning it with the team's architectural standards.
Decide: The Art of the "Good Enough"
We’ve all been guilty of "analysis paralysis," where we spend hours debating variable naming instead of focusing on system design. When you reach the decision phase, ask yourself: Does this comment move the needle? If it doesn't, skip it. If you find yourself struggling to make decisions, it’s often because your mental models are outdated or you're too attached to your own way of doing things. I’ve found that applying Mental Models: Control Theory for Better Software Engineering helps me keep my feedback focused on system stability rather than personal preference.
Act: Closing the Loop
The "Act" phase is where developer productivity is either made or broken. If your feedback is vague, you just start a new, longer loop. Use specific, actionable language. Instead of saying "This looks messy," say "This function exceeds our cyclomatic complexity limit of 10; consider breaking it into two smaller units." By being precise, you help the author close their own loop faster.
Why This Matters for Velocity
I once worked on a team where PRs would sit for an average of 3.5 days. It was painful. We were treating code reviews as a "catch-all" for every concern. By teaching the team to cycle through the OODA loop—scanning for high-impact issues, orienting toward business goals, and deciding on only the most critical feedback—we cut that time down to roughly 14 hours.
We stopped treating every PR like a thesis defense. We started treating it like a collaborative iteration.
The Caveat
Is the OODA loop a silver bullet? Absolutely not. If your team culture is rooted in fear or perfectionism, no mental model will save you. You can have the fastest loop in the world, but if the "Act" phase is constantly met with ego-driven pushback, the cycle breaks.
Next time you open a PR, try to be conscious of which phase you’re in. Are you stuck in "Observe" because you don't understand the requirement? Are you stuck in "Decide" because you're afraid to approve a PR that isn't perfect? Identifying where you're hung up is the first step toward faster, more effective collaboration.