# Evaluation

A derived interpretation of observations and targets under a named policy.

Input (Observation) and Input (Metric Target) preserve the evidence and comparison basis. Value and Rank are stored numbers, not formula fields. Gradeability has Supported, Unmeasured, Invalid and Unknown options. The current base has no native automations and the three n8n workflows do not populate Evaluation; do not present these fields as automatically calculated.

## Use and boundaries

Field names below are the current product labels. `*` and `°` are UI markers, not database constraints. A preferred single-record selection is not a global cardinality constraint either. The related guide explains operational rules.

[Related guide](/systems/kpis-okrs/review-results) · [All entities](/systems/kpis-okrs/entities)

## Fields

| Field | Storage | Source, options or boundary |
| --- | --- | --- |
| Evaluation # | Auto number | Generated by Airtable. |
| Input (Observation) | Linked records | [Observation](/systems/kpis-okrs/entity-observation) |
| Input (Metric Target) | Linked records | [Metric Target](/systems/kpis-okrs/entity-metric-target) |
| Evaluation Policy | Single select | task-completion-v1, kpi-average-v1, expected-pace-v1 |
| Subject (Membership) | Text | Text reference; not a linked record. |
| Subject (Team) | Text | Text reference; not a linked record. |
| Subject (Department) | Text | Text reference; not a linked record. |
| Subject (Organization) | Text | Text reference; not a linked record. |
| Period | Text | Stored value. |
| Value | Number | Stored value. |
| Comparison Basis | Text | Stored value. |
| Rank | Number | Stored value. |
| Summary Type | Text | Stored value. |
| Gradeability | Single select | Supported, Unmeasured, Invalid, Unknown |
| Milestones | Linked records | [Milestone](/systems/kpis-okrs/entity-milestone) |
| Tags | Linked records | [op:tags](/systems/kpis-okrs/entity-op-tags) · optional labels from the Core Tags catalog; classification only. |

## Example and maintenance

Illustrative example only: a policy compares the recorded value with Target v1 and stores a derived result. It does not mean an evaluator runs.

Use the existing fictitious records to inspect relationships in the guide. Before changing fields, check lookups, formulas, intakes and workflow contracts. This page documents structure; a field does not prove that an integration populates it.