---
id: workflow.troubleshooting.coverage
title: Coverage classification and representation
summary: The Case population or facet analysis does not represent the intended development objective.
kind: error
product_area: troubleshooting
status: stable
updated: 2026-11-11
canonical: /docs/troubleshooting/coverage
---

# Coverage classification and representation

## Symptom

The Case population or facet analysis does not represent the intended development objective.

## Likely causes

| What you observe | Focused guide |
| --- | --- |
| Classification is missing, ambiguous, or incorrect | [Dimension classification troubleshooting](/docs/troubleshooting/dimension-classification) |
| The facet vocabulary changed | [Stale Dimensions](/docs/troubleshooting/stale-dimensions) |
| Important conditions are underrepresented | [Unbalanced Coverage](/docs/troubleshooting/unbalanced-coverage) |

## Fix

Check the selected population, vocabulary, unclassified counts, and intended proportions. Correct the owning facet, classification, or membership through its normal workflow; inspect the resulting representation before creating a new Snapshot.

Follow the focused guide for the actual state you observe; keep accepted records and explicit human decisions intact.

## Prevention

Preserve exact object and version identities, review the relevant source context, and inspect the accepted state before comparing outcomes.

## Related task pages

{% related-card-grid title="Return to the workflow" %}
- [Complete your first alignment loop](/docs/quickstart)
{% /related-card-grid %}

## Related reference pages

{% related-card-grid title="Diagnose the observed state" %}
- [Dimension classification troubleshooting](/docs/troubleshooting/dimension-classification)
- [Stale Dimensions](/docs/troubleshooting/stale-dimensions)
- [Unbalanced Coverage](/docs/troubleshooting/unbalanced-coverage)
{% /related-card-grid %}