---
type: "Concept"
title: "Federated evaluation"
description: "Measuring models when data and outcome definitions stay distributed."
tags: [fl, evaluation, federated]
generated: { by: human:crpage, at: 2026-07-09T09:44:00Z }
status: stable
---

Evaluation is a **first-class systems problem** in FL: centralised test assumptions often fail when data and outcome definitions remain distributed. A substantial literature now treats federated evaluation in its own right.

Relates to: [Evaluation rubric](evaluation-rubric.md), [Non-IID data](non-iid-data.md).