TS EN 60706-5

TS EN 60706-5 addresses testability and diagnostic testing within the broader field of equipment maintainability. It is intended to guide early consideration of testability during design and development and to support the definition of effective test procedures as an integral part of operation and maintenance. In general technical terms, testability is the degree to which a system can be examined for faults, and diagnostic testing is the use of tests to identify fault location, fault type, or the nature of a functional degradation.

Why testability matters in design and service

Maintainability is not limited to repair speed; it also depends on how easily a fault can be verified, whether suitable test access exists, whether the right equipment is available, and whether test results can be interpreted reliably. For that reason, testability must be considered early, while the equipment architecture is still being shaped. Diagnostic testing then helps reduce downtime, avoid unnecessary part replacement, and make troubleshooting more systematic. This part of the standard focuses on guiding those concerns into design and maintenance practice.

Technical focus covered by this part

• Provides guidance for early consideration of testability aspects in design and development.
• Supports the determination of effective test procedures as part of operation and maintenance.
• Is a technically revised second edition that expands the techniques and systems outlined in the first edition.
• Belongs to the maintainability series with emphasis on test and diagnostic verification.