jarvis-at-skic
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37 lines
2.2 KiB
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37 lines
2.2 KiB
Plaintext
---
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id: change-fail-rate
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slug: /measurement/change-fail-rate
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title: Change fail rate
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description: Definition, collection evidence and limitations for change fail rate.
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---
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<div className="strategy-content">
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**Target operating model — recommended contracts, not installed collection.** All owner and cadence entries below are proposals to confirm before the pilot, not assigned responsibilities or approved schedules.
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**Prototype calculation — no live telemetry.** The synthetic example calculates this metric; it has no network collectors.
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{/* contract:start */}
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Production deployment effects requiring unplanned remediation, rollback or hotfix, not solely outage declarations.
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| Contract | Definition |
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| --- | --- |
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| Numerator | Distinct matured production deployment_ids linked to qualifying immediate intervention |
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| Denominator | All distinct production deployment_ids that reached production in the matured deployment cohort |
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| Expression | N / D * 100 |
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| Aggregation | percent |
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| Unit | % |
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| Eligible population | Deployments with production effect during window and approved intervention follow-up horizon elapsed. |
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| Exclusions | Failed preproduction attempts, duplicate callbacks and no-effect retries; failures after production effect stay included. |
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| Events and source | deployment.completed; deployment.failed; incident.linked; release and incident records |
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| Owner / cadence | Quality Engineering / Weekly; finalized after horizon |
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| Missing evidence | Known failures / all eligible deployments is a lower bound where incident linkage incomplete; label provisional and report unknown links. |
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| Gaming and limits | Avoid incident links or relabel intervention planned; reconcile rollbacks/hotfixes independently. Descriptive signal, not causal AI productivity attribution. Source completeness, task mix and sampling limit inference; report uncertainty. Define immediate intervention and follow-up horizon before pilot; no universal incident-to-AI attribution. |
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{/* contract:end */}
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Read the shared [collection and safeguards](./collection-and-safeguards.mdx) before collecting data; see the [synthetic example and limits](./synthetic-example.mdx).
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Return to [Skills Measurement](./index.mdx).
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</div>
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