TS EN 17666

TS EN 17666 is a maintenance engineering standard that addresses the discipline across the full life cycle of an item and explains how maintenance engineering can support the required level of dependability while balancing performance, risk and cost. Its focus is maintenance as an engineering function, not merely as corrective work after a failure.

What maintenance engineering is meant to cover

The standard provides guidance on how maintenance engineering can contribute to the maintenance process from a technical and managerial perspective. Concepts such as dependability, availability, sustainability and life-cycle cost are central to understanding why maintenance engineering is treated as a distinct discipline. In practice, this means looking beyond keeping equipment running and considering how maintenance strategy supports the intended service level over time.

Boundaries and related standards

The document refers to other standards that describe detailed methods and techniques, so it is not a self-contained manual for every maintenance tool or method. It also does not provide guidance on setting up maintenance engineering systems and infrastructure, and it excludes software maintenance. For software components of an item, maintenance activities are covered by ISO/IEC/IEEE 14764, while the overall maintenance process is covered by EN 17007.

• Covers maintenance engineering throughout the life cycle.
• Addresses how maintenance supports dependability, performance, risk and cost balance.
• Points to other standards for detailed methods and techniques.
• Does not cover setup of maintenance engineering systems and infrastructure.
• Does not include software maintenance.