performance levelniveau de performancePerformance Level性能等级

ability of safety-related parts of control systems to perform a safety function with an average probability of dangerous failure per hour less than 10-4

ability of safety-related parts of control systems to perform a safety function with an average probability of dangerous failure per hour less than 10-5

ability of safety-related parts of control systems to perform a safety function with an average probability of dangerous failure per hour less than 3 x 10-6

ability of safety-related parts of control systems to perform a safety function with an average probability of dangerous failure per hour less than 10-6

ability of safety-related parts of control systems to perform a safety function with an average probability of dangerous failure per hour less than 10-7