Code Review Best Practices | 24h Turnaround SLA
Complete code reviews within 24 hours. Keep PRs under 400 lines. GitScrum tracks review status, measures turnaround, and identifies bottlenecks automatically.
5 min read
Effective code reviews balance thoroughness with speed, catching important issues while avoiding review bottlenecks that slow delivery. GitScrum's integration with code review tools helps teams track review status, identify bottlenecks, and ensure reviews happen promptly without blocking developers.
Review Process Design
Review SLAs
CODE REVIEW SERVICE LEVELS:
┌─────────────────────────────────────────────────────────────┐
│ METRIC │ TARGET │ ACTION IF MISSED │
├─────────────────────────┼─────────────┼─────────────────────┤
│ First response │ < 4 hours │ Reminder in Slack │
│ Review complete │ < 24 hours │ Escalate to lead │
│ PR merge after approval │ < 2 hours │ Author notified │
│ Revision turnaround │ < 4 hours │ Priority bump │
└─────────────────────────────────────────────────────────────┘
Track in GitScrum:
• Dashboard shows avg review time
• Alerts for stale PRs
• Team metrics for review velocity
PR Size Guidelines
OPTIMAL PR SIZE:
┌─────────────────────────────────────────────────────────────┐
│ │
│ LINES OF CODE │ REVIEW TIME │ DEFECT DETECTION │
├───────────────┼─────────────┼───────────────────────────────┤
│ < 200 │ 15-30 min │ High - thorough review │
│ 200-400 │ 30-60 min │ Good - effective review │
│ 400-800 │ 1-2 hours │ Medium - reviewer fatigue │
│ > 800 │ 2+ hours │ Low - superficial review │
└───────────────────────────────────────────────────────────────┘
STRATEGIES FOR SMALLER PRs:
• Ship refactoring separately from features
• Split large features into incremental changes
• Use feature flags for partial implementations
• Separate test additions from code changes
Review Quality
What to Look For
CODE REVIEW CHECKLIST:
┌─────────────────────────────────────────────────────────────┐
│ │
│ CORRECTNESS: │
│ □ Does it do what it's supposed to? │
│ □ Edge cases handled? │
│ □ Error conditions covered? │
│ │
│ DESIGN: │
│ □ Is the approach appropriate? │
│ □ Does it fit the architecture? │
│ □ Is it maintainable? │
│ │
│ READABILITY: │
│ □ Clear naming? │
│ □ Appropriate comments? │
│ □ Reasonable complexity? │
│ │
│ TESTING: │
│ □ Tests included? │
│ □ Test coverage adequate? │
│ □ Edge cases tested? │
│ │
│ SECURITY: │
│ □ No sensitive data exposed? │
│ □ Input validation present? │
│ □ Authentication/authorization correct? │
└─────────────────────────────────────────────────────────────┘
Constructive Feedback
EFFECTIVE REVIEW COMMENTS:
┌─────────────────────────────────────────────────────────────┐
│ │
│ INSTEAD OF: TRY: │
├───────────────────────────────┼─────────────────────────────┤
│ "This is wrong" │ "This might cause X. │
│ │ Consider Y instead?" │
├───────────────────────────────┼─────────────────────────────┤
│ "Bad naming" │ "What about `userCount` │
│ │ for clarity?" │
├───────────────────────────────┼─────────────────────────────┤
│ "Why did you do this?" │ "I'm curious about the │
│ │ reasoning here - can you │
│ │ explain?" │
└─────────────────────────────────────────────────────────────┘
COMMENT PREFIXES:
[nit] - Minor style preference, optional
[suggestion] - Consider this approach
[question] - Need clarification
[blocker] - Must fix before merge
Review Workflow
GitScrum Integration
PR → TASK LIFECYCLE:
┌─────────────────────────────────────────────────────────────┐
│ │
│ AUTOMATED STATUS UPDATES: │
│ │
│ PR Created → Task moves to "In Review" │
│ Review Done → Task shows "Approved" badge │
│ Changes Req → Task shows "Changes Requested" │
│ PR Merged → Task moves to "Done" │
│ │
│ GITSCRUM TASK VIEW: │
│ ┌────────────────────────────────────────────────────────┐ │
│ │ Task #234: User Authentication │ │
│ │ Status: In Review │ │
│ │ │ │
│ │ Linked PR: #456 - Implement login flow │ │
│ │ ✓ CI Passed | 👀 2 reviewers | 💬 5 comments │ │
│ │ Last activity: 2 hours ago │ │
│ └────────────────────────────────────────────────────────┘ │
└─────────────────────────────────────────────────────────────┘
Review Assignment
REVIEWER SELECTION:
┌─────────────────────────────────────────────────────────────┐
│ │
│ AUTOMATIC ASSIGNMENT: │
│ • Round-robin among team │
│ • Code owners for specific paths │
│ • Based on expertise tags │
│ │
│ CONSIDERATIONS: │
│ • Balance review load across team │
│ • Include domain expert for complex changes │
│ • Junior devs review for learning │
│ • Senior review for critical paths │
│ │
│ GITSCRUM TRACKING: │
│ • Review load per team member │
│ • Average review time by reviewer │
│ • Review quality metrics │
└─────────────────────────────────────────────────────────────┘
Measuring Review Effectiveness
Review Metrics
KEY REVIEW METRICS:
┌─────────────────────────────────────────────────────────────┐
│ │
│ PROCESS METRICS: │
│ • Time to first review: 3.2 hours avg │
│ • Time to merge: 18 hours avg │
│ • Revision cycles: 1.3 avg │
│ │
│ QUALITY METRICS: │
│ • Issues found in review: 2.1 per PR avg │
│ • Post-merge bugs: 0.3 per PR avg │
│ • Review escape rate: 5% │
│ │
│ TEAM HEALTH: │
│ • Review participation: 85% of team │
│ • Load distribution: Even (±15%) │
│ • Comment tone: Constructive │
└─────────────────────────────────────────────────────────────┘