The purpose of this paper is to give a high level view of offshore safety cases to help the reader better understand their purpose, and what is entailed in developing one. To help set the stage, some background historical information is given on the development of the safety case, and how the offshore safety case regulations were first implemented by the UK HSE in 1992. Because the UK has been such an important driver in the development of safety cases, there is a heavy emphasis placed on the UK requirements. The requirements in other safety case regulatory regimes will differ significantly in detail, but the basic premise of the regulations will be similar. There is a brief discussion of the level of effort required to complete a safety case, and some of the problems encountered by designers when first designing a facility in a safety case regulatory regime. Finally, the paper discusses some of the advantages and limitations of enacting safety case regulations. The thought processes behind the paper have been largely based on safety cases for Mobile Offshore Drilling Units (MODUs) and while there are some significant differences in a safety case for a production platform, the basic components do not change.

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