Interview
summary
Argues that productive post-mortems require separate facts from judgment rather than hunting a single root cause, citing aviation research that lists 191 root causes to show “no root cause.” Recommends gathering individual written recollections, aggregating monitoring data into a timeline, and storing reports to spot regressions. Recommends tools: Etsy’s Morgue post-mortem tool, ChatOps bots for audit trails, and shared-terminal tools for pair-debugging; these practices reduce hindsight, outcome, and correspondence biases.
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