IEC 61511-2:2003 pdf download.Functional safety - Safety instrumented systems for the process industry sector
5.2.1.2 When an organization has responsibility for one or more activities necessary for functional safety and that organization works according to quality assurance procedures, then many of these activities described in this clause will already be carried out for the purposes of quality. Where this is the case, it may be unnecessary to repeat these activities for the purposes of functional safety. In such cases, the quality assurance procedures should be reviewed to establish that they are suitable so that the objectives of functional safety will be achieved.
5.2.2 Organization and resources
5.2.2.1 The organizational structure associated with safety instrumented systems within a Company/Site/Plant/Project should be defined and the roles and responsibilities of each element clearly understood and communicated. Within the structure, individual roles, including their description and purpose should be identified. For each role,unambiguous accountabilities should be identified; and specific responsibilities should be recognised. In addition, whom the individual reports to and who makes the appointment should be identified.The intent is to ensure that everyone in an organization understands their role and responsibilities for safety instrumented systems.
5.2.2.2 The skills and knowledge required to implement any of the activities of the safety life cycle relating to the safety instrumented systems should be identified; and for each skill, the required competency levels should be defined. Resources should be assessed against each skill for competency and also the number of people per skill required. When differences are identified, development plans should be established to enable the required competency levels to be achieved in a timely manner. When shortages of skills arise, suitably qualified and experienced personnel may be recruited or contracted.
5.2.3 Risk evaluation and risk management
The requirement stated in 5.2.3 of IEC 61511 is that hazards are identified, risks evaluated and the necessary risk reduction is determined. It is recognized that there are numerous different methodologies available for conducting these evaluations. IEC 61511-1 does not endorse any particular methodology. Instead, the reader is encouraged to review a number of methodologies on this issue in IEC 61511-3. See 8.2.1 for further guidance.
5.2.4 Planning
The intent of this subclause is to ensure that, within the overall project, adequate safety planning is conducted so that all of the required activities during each phase of the lifecycle (for example, engineering design, plant operation) are addressed. The standard does not require any particular structure for these planning activities, but it does require periodic update or review of them.IEC 61511-2 pdf download.