PDS is the Norwegian acronym for "Pålitelighet og tilgjengelighet av Datamaskinbaserte Sikringssystemer", which in English translates to "Reliability and availability of computer based safety systems".
SINTEF has developed a method for quantifying the reliability/availability of safety instrumented systems (SIS), called the PDS method. The method is widely used in the petroleum industry, but is also applicable to other business sectors.
The PDS method is in line with the main principles advocated in the IEC 61508 / 61511 standards, and is a very useful tool when implementing and verifying quantitative (SIL) requirements as described in these standards. The PDS method is continuously updated, and new method and data handbooks are issued in January 2010. The data handbook is based on extensive experience with operation of instrumented safety systems in the Norwegian petroleum industry and presents data applicable for performing SIL analyses according to IEC 61508 / 61511.
In January 2010 SINTEF is issuing a new updated PDS method handbook and a data handbook. The new handbooks have been prepared as part of the user initiated research project “Management and follow-up of SIS integrity”. This project is sponsored by the Norwegian Research Council and the PDS forum participants.
“PDS Forum” is a co-operation between oil companies, engineering companies, consultants, vendors and researchers, with a special interest in safety instrumented systems.At present there are 23 participating companies in the forum, meeting twice a year for workshops, presentations and technical discussions.
The next meeting in PDS forum is October 26-27, 2010, in Trondheim.
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