Instrumented safeguards are essential part of process plant safety system. Life and property safety often rely on functionality of instrumented safeguard functions. It is important that Safety Instrumented Functions are designed to give adequate risk reduction so that residual risks are acceptable according to company and local regulations.
. IEC-61511 & IEC-61508 provide framework for determination of risk reduction required for a Safety Instrumented Function and the design of function based on PFDavg calculation.
Shepherd Risk provides services for SIL determination by LOPA & Risk Graph methods and SIF design based on IEC-61511/61508 PFDavg calculations. Our Functional Safety Experts assist clients in design and maintenance of Safety Instrumented Functions.