Functional Safety 2014

| Slide 9

Operating conditions

The Safety Integrity Level achieved during design and

engineering is as per the required target SIL

The on-going safety performance – i.e., SIL may be

affected by the operating conditions

Periodic maintenance and proof testing is required to be

implemented so as to ensure the continued and

demonstrable integrity of each SIF post commissioning.

The IEC 61511 safety lifecycle approach requires, that

appropriate competency is applied

How can an operator who is challenged with maintaining

process safety and maintaining aggressive production

targets actually implement and monitor a verification and

proof testing program?

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