Functional Safety Practices for Operations & Maintenance

Operation and maintenance teams bear a heavy responsibility to ensure that the Safety Instrumented System integrity and reliability is sustained. Decisions made long before operation begins, or outside the operating environment often impact the ability to be...

Statistical Signature Analysis

In order to assign a SIL to equipment in low demand applications, we must be able to compute PFDavg. To compute PFDavg, we must first have a model for λD(t), the failure rate of the equipment in the dangerous failure mode. A dangerous failure occurs when equipment...

Strategic Proof Testing

Safety Instrumented Systems (SIS) are designed to provide automatic protection functions. A typical design includes a sensor to detect the potentially dangerous condition, a safety PLC and a remote actuated valve capable of taking action to prevent an accident. In a...