Episode
How SRE Teams Use Fault Tree Analysis to Prevent Root Causes
- Published
- Jun 25, 2026
- Duration seconds
- 709
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Summary
In this episode of The Site Reliability Podcast, Lucas and Luna explore how SRE teams apply fault tree analysis (FTA) from aerospace and nuclear engineering to reduce incident recurrence. Using a real 2025 outage at a major streaming platform where a cascading DNS failure took down services for 47 minutes, they break down the top-down logic of FTA, how it differs from postmortem 5 whys, and why teams at companies like Netflix and Amazon are adopting it alongside their existing incident analysis toolkit. Lucas explains the basic mechanics: starting with an undesired top event, then decomposing it into intermediate and basic events united by AND/OR gates, calculating probability cut sets, and using the results to prioritize mitigations. Luna pushes back on the learning curve and time investment, and they discuss lightweight variants like 'bow-tie analysis' used by smaller teams. The episode also touches on common pitfalls: confirmation bias, data quality, and treating a first-pass FTA as finished. Practical takeaway: any team can run a two-hour FTA workshop after a major incident to surface hidden single points of failure. #FaultTreeAnalysis #SRE #SiteReliabilityEngineering #RootCauseAnalysis #IncidentManagement #ReliabilityEngineering #Postmortem #5Whys #BowTieAnalysis #DNSOutage #CascadingFailure #Netflix #Amazon #ProductionEngineering #Technology #FexingoBusiness #BusinessPodcast #SREPodcast Keep every episode free: buymeacoffee.com/fexingo