11 Maintainability of SRP/CS

Preventive or corrective maintenance can be necessary to maintain the specified performance of the
SRP/CS.

NOTE Exceeding specified lifetime or test interval can lead to deterioration in safety or to a hazardous
situation.

When designing an SRP/CS, the following factors shall be taken into account to enable maintenance of
the SRP/CS:
— accessibility, taking into account the environment and the human body measurements, including
the dimensions of the working clothes and tools used;
— ease of handling, taking into account human capabilities;
— limitation of the number of special tools and equipment for those applications where special;
— indication(s) that maintenance is necessary (e.g. increased vibration) ideally with automated
generation of warning signals (e.g. lifetime recording, self-test, monitoring of process parameters);
— required illumination levels.