Safety Instrumented Systems Verification: Practical Probabilistic Calculations

b. false. The standards only require that the general requirements of the safety lifecycle as outlined in the respective standard be followed.
e. All of the above
d. Satisfying legal requirements, meeting customer demands and achieving cost savings are all likely outcomes of following the IEC 61511 or IEC61508 standard. The challenge in realizing the cost savings is in how a firm chooses to use the standard most efficiently and effectively for safety system design and use.
d. Process hazards analysis is step 3 of the IEC safety lifecycle falling just after scope definition and just before overall specifying overall system requirements.
b.
b. SIL Verification Analysis is not usually part of the analysis phase. SIL verification is conducted after a safety instrumented function conceptual design has been put forward. This step should only occur after the safety requirements specification is complete at the end of the analysis phase of the SLC.
d. Functional safety management applies to all phases of the safety lifecycle.
b. Analyze Risk
c. The SLC ends only when the safety instrumented system is decommissioned and taken out of service.
a. The physical design of the system and the ability to be located in an environment with flammable material are important characteristics for both control systems and safety systems.
c.
d. all of the above
d. fail-safe
a. A SIS most typically acts to reduce the likelihood of a harmful event by sensing a potentially unsafe...