CAN/CSA-Q634-91

Sets out general requirements and gives guidelines for selecting and implementing risk analysis techniques, primarily for technological hazards. Risk analysis is a structured process that attempts to identify both the extent and likelihood of consequences associated with such hazards. Risk analysis answers three fundamental questions: (1) What can go wrong? (2) How likely is it? and (3) What are the consequences? This Standard also provides guidelines to ensure that the results of the risk analysis are documented with sufficient clarity that they can be readily reviewed and used by persons other than the author(s) of the analysis. This process not only ensures that the results of the analysis achieve the required quality, it also enables the analyst to demonstrate that this is so. 1.2 This Standard has three major parts: (a) Clause 4 describes the concepts, scope, and objective of the risk analysis process itself; (b) Clause 5 sets out the requirements for the risk analysis process; and (c) Clause 6 describes methods that are applicable to risk analysis. 1.3 This Standard can be used as a (a) guideline for planning, executing, and using risk analyses; (b) basis for specifying quality requirements for risk analysis (this can be particularly important when dealing with external consultants); or (c) basis for evaluating risk analyses after completion. Risk analysis should be performed as set out in this Standard to provide input to the risk management process (see Figure 1). 1.4 This Standard does not (a) provide specific criteria for identifying the need for risk analysis; (b) specify the type of risk analysis method that is required for a given situation; (c) offer detailed guidelines for specific hazards; or (d) address insurance, actuarial, legal, or financial interests.