BS EN 61508-5:2002

BS EN 61508-5:2002 provides information on:

• the underlying concepts of risk and the relationship of risk to safety integrity (see annex A)
• a number of methods that will enable the safety integrity levels for the E/E/PE safety-related

  systems, other technology safety-related systems and external risk reduction facilities to be

  determined (see annexes B, C, D and E).