/community-hubs/deltav-community-connect/b/safety-weblog/posts/valve-reliability-in-safety-instrumented-functions-37735026The three key components in a safety instrumented function (SIF)—sensor, logic solver and final element—each have their own probabilities of how they will perform, or not perform, when called upon to bring the process to a safe state. Of these three componentsen-USTelligent Community 13