While reliance on instrumentation has increased at an incredible pace, resources allocated to design and manage the equipment have declined in many companies, leading to more burden and expectations being placed on fewer and fewer people. Quality instrumented system performance relies on a rigorous management system that minimizes human error and equipment failure potential. This paper focuses on safety instrumented systems and applicable process safety management requirements. Observations from assessments and audits are provided, illustrating poor performing instrumented systems, inadequate operating and maintenance procedures, poor recordkeeping and retention practices, and out-of-date documentation.
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