The terminology XooY (read X out of Y) refers to the voting and redundancy capacity of a safety system. A safety system carries out a safety function. The Y refers to how many times the safety system carries out the safety function, it refers to the redundancy within the safety system. For...
What you need is basically a reliability study. You determine what the probability of failure is of each equipment and decide whether this is acceptable for you. If it is not acceptable you make sure you test (maintain) the equipment periodically until your reach a probability of failure which...
You can find SIL and other risk and safety tools at: http://shop.risknowlogy.com Risknowlogy
info@risknowlogy.com
http://www.risknowlogy.com
http://shop.risknology.com for software tools, industry reports, books on risk, reliability & safety
