Learn vocabulary for chaos engineering culture: chaos maturity model, GameDay practice, blameless culture, and psychological safety.
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What is the 'chaos maturity model'?
The chaos maturity model (popularised by Gremlin and others) describes progression through levels: ad-hoc/manual experiments → repeatable experiments → automated chaos in staging → continuous chaos in production with full automation and observability.
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A team lead says 'GameDay is a practice drill, not a production incident'. What is a GameDay?
GameDay is a deliberate, pre-planned exercise (borrowed from sports/military practice) where teams simulate failure scenarios to test their response capabilities, validate runbooks, and find resilience gaps — in a controlled, low-stakes environment.
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What does 'blameless chaos culture' mean?
Blameless chaos culture means that when a chaos experiment reveals a weakness, the focus is on improving the system — not blaming the engineer who built it. This encourages honest reporting and willingness to experiment.
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Why is 'psychological safety' important in chaos engineering practice?
Without psychological safety, teams hide weaknesses, avoid running experiments that might reveal problems, and cover up results. Psychological safety is a prerequisite for an honest, effective chaos practice.
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When someone says 'we ran a chaos experiment on the payment service', what professional context does this imply?
'Running a chaos experiment on a service' means deliberately injecting controlled failures (latency, errors, resource exhaustion) in a planned, observable way — it's a proactive reliability practice, not an accident.