---
id: validated-task-success
slug: /measurement/validated-task-success
title: Validated task success
description: Definition, collection evidence and limitations for validated task success.
---

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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.

**Prototype calculation — no live telemetry.** The synthetic example calculates this metric; it has no network collectors.

{/* contract:start */}
Confirmed independently accepted tasks as a share of all eligible initiated tasks in a matured start cohort; a conservative confirmed-success share, not observed failure rate.

| Contract | Definition |
| --- | --- |
| Numerator | Distinct matured task_ids with valid independent task.accepted evidence by as_of |
| Denominator | All distinct eligible task_ids started in window with started_at + preregistered task_observation_hours &lt;= as_of |
| Expression | N / D * 100 |
| Aggregation | percent |
| Unit | % |
| Eligible population | Tasks in a preregistered workflow cohort, started in window; each counted once across retries, skills and clients. |
| Exclusions | Cancelled before start, sandbox/evaluation tasks and out-of-scope workflows; never post-start failures/abandonments. |
| Events and source | task.started; task.accepted; task.failed; task.abandoned; task.cancelled; work-management acceptance record |
| Owner / cadence | Quality Engineering / Weekly pilot; monthly departmental outcome review |
| Missing evidence | Unresolved/missing terminal outcomes remain in denominator with unknown count and known-outcome coverage; do not label them failed. Invalid/missing start excluded from calculation but flagged as orphan evidence. |
| Gaming and limits | Split easy tasks or omit starts; reconcile starts to approved backlog and audit acceptance rubrics. Descriptive signal, not causal AI productivity attribution. Source completeness, task mix and sampling limit inference; report uncertainty. Maturation horizon is workflow-specific and must be approved; no automatic abandonment on timeout. |
{/* contract:end */}

Read the shared [collection and safeguards](./collection-and-safeguards.mdx) before collecting data; see the [synthetic example and limits](./synthetic-example.mdx).

Return to [Skills Measurement](./index.mdx).

</div>