Process accidents are often the result of unexpected interaction between automated process equipment and operators. In the drive to improve safety and reliability, process facilities tend to rely heavily on automation using sophisticated instrumentation, computers, and programmable logic controllers to run their plants. In an effort to improve energy efficiency and reduce pollution, various pieces of equipment are interconnected in ways that complicate their operation. Equipment failures or operator errors can lead to sudden and unexpected changes in the plant operation. If these disruptions to normal process operation exceed the capabilities of the operators or the capacity of the safety systems, a severe accident can occur, potentially producing a devastating fire, explosion, or toxic release. By its nature, process safety impacts the entire range of business activity in a large refining and petrochemical organization. As a result, implementing process safety management is a complex affair. Awareness of the key interfaces between management functions is critical in ensuring that risk controls are managed coherently.
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Added by JFPS Group Malaysia on June 3, 2010