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Process Metrics

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17.1🔒Cycle Time for Bug FixesWhat it measures: The time from when a bug is reported to when the fix is deployed to production.92 words

17.2🔒Lead Time for FeaturesKEY FORMULA: Lead Time = Deployment Date - First Commit Date45 words

17.3🔒Deployment FrequencyHigher deployment frequency requires faster testing:55 words

17.4🔒Change Failure RateKEY FORMULA: Change Failure Rate = (Failed Deployments / Total Deployments) x 10059 words

17.5🔒Q&ASelf-Assessment Quiz: Chapter 171. What are the four components of bug fix cycle time? 2. If testing accounts for 40% of lead time, what should you investigate? 3. What…51 words

17.6🔒Key Takeaways- Bug fix cycle time reveals bottlenecks -- measure each phase separately - Lead time shows whether testing is the bottleneck in delivery…56 words

17.7🔒Hands-On ExercisesExercise 17.1 (Beginner): Track cycle time for the last 10 bugs. Calculate average and identify the longest phase.76 words

17.8🔒Q&AResume phrasing- Reduced bug fix cycle time from 5.2 days to 2.1 days by identifying triage as the bottleneck (3-day average triage time) and implementing…103 words

17.9🔒Q&ACover letter framingI track process metrics -- cycle time, lead time, deployment frequency, and change failure rate -- because they reveal whether testing is…72 words

17.10🔒Q&AInterview framing"I approach process metrics through the DORA framework: deployment frequency, lead time, change failure rate, and MTTR. I optimize for the…75 words

17.11🔒Q&AWhat not to say- "Our cycle time is 5 days, but that's normal" -- without benchmarking against DORA metrics, you do not know if that is normal or slow…91 words

17.12🔒Q&AQuestion 1Prompt: Your team deploys weekly but has a 25% change failure rate. What does this tell you and what do you do? What a strong answer should…180 words

17.13🔒Q&AQuestion 2Prompt: Testing accounts for 40% of your team's feature lead time. Is that too much? How do you reduce it without sacrificing quality? What…191 words

17.14🔒Q&AQuestion 3Prompt: How do the four DORA metrics connect? Can you improve one without improving the others? What a strong answer should cover: - The…191 words