Safety instrumented system design in consideration of cost-benefit analysis : A case study of tail gas treating process

A justification of the cost for providing system instrumented system (SIS) is essential for making the right decision of companies in process industry sector. This paper presents a design of the SIS by considering in cost-benefit analysis for optimizing safety, reliability, and lifecycle costs. A tail gas treating process is employed as a case study for verifying the proposed design method. The results obtained from our case study can be useful as the tools for justifying the design and installation of safety systems. Validation results of cost-benefit analysis for the proposed SIS design are also included.