Information technology - Data centre facilities and infrastructures - Part 31: Key performance indicators for resilience

Overview

ISO/IEC TS 22237-31:2026 is the second edition of the technical specification that defines resilience KPIs for data centre infrastructure. It was published on 3 February 2026, runs to 60 pages and revises the first edition of 2023. According to the publisher's abstract, it provides metrics for resilience, dependability, fault tolerance and availability tolerance. This page rests on the publisher's public abstract, not on the full text of the standard.

The scope is data centre infrastructure for power distribution and supply and for environmental control; it can be extended to areas such as cabling. The document defines how these KPIs are measured and calculated, and the resulting resilience levels (RLs). It targets maintainability, recoverability and vulnerability, and includes worked examples for comparing designs. A scope note says it can be extended, so the method is not tied to one fixed list of subsystems.

An important limit is what falls outside the scope: IT equipment, cloud services, software and business applications are not covered. The standard therefore assesses the resilience of the physical facility infrastructure only. Related documents include ISO/IEC 22237-1, EN 50600-4-31 and IEEE 3006.7.

Key points

1. Defines KPIs for resilience, dependability, fault tolerance and availability tolerance of data centres.
2. Covers power distribution/supply and environmental-control infrastructure; extendable to e.g. cabling.
3. Defines measurement and calculation of the KPIs and resilience levels (RLs).
4. Targets maintainability, recoverability and vulnerability; includes worked comparison examples.
5. Does not apply to IT equipment, cloud services, software or business applications.
6. Edition 2 published 3 February 2026 (60 pages); revises the 2023 first edition.
7. Related: ISO/IEC 22237-1, EN 50600-4-31, IEEE 3006.7.

Using it in design

• In the reliability module, add a resilience-level calculator that compares alternative power/cooling topologies on maintainability, recoverability and vulnerability.
• Complement redundancy-class checks with a quantitative score.
• When choosing between two designs of the same redundancy class, use the standard's worked comparison examples as the method.
• Apply the assessment to facility infrastructure only; the IT and software layers must be handled separately.

Who should read it

Design engineers comparing power and cooling topologies, and consultants and owners preparing a resilience-class justification.

Related standards

• ISO/IEC 22237-1
• EN 50600-4-31
• IEEE 3006.7

Publication details

Authors

ISO/IEC JTC 1

Publisher

ISO/IEC

Year

2026

Document number

ISO/IEC TS 22237-31:2026

Document language

English

Source type

Standard

Access

Citation only

Licence

Copyright retained; citation only — the publisher’s terms apply to the original document

Citation