A More Complex PSSR

Here is an example of applying the algorithm to a higher risk trigger event. We will use the Table 4-1 - Typical Risk-based Decision-making Steps in a PSM PSSR Procedure to determine the potential impact. 

The trigger event for this example is the modification of an existing process to include a new chemical additive injection system. The major components to consider for this trigger event consist of  

GUIDELINES FOR PERFORMING EFFECTIVE PRE-STARTUP SAFETY REVIEWS 

Become aware of a triggering event (a change in regard to process safety or other organizationally defined standard). 

YES 0 NO The change involves equipment in a process that involves materials with  

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If any items are answered yes, in the above example of a risk-based approach, then study the change in detail and plan to perform a more complex PSSR rather than a simple PSSR. Additional considerations are provided in Chapter 4-A Risk-based Approach to Pre-startup Safety Review. 

The second is at the design phase of a more complex PSSR. 

The same electronic checklist for a more complex PSSR in progress can be expanded as each applicable data field is completed. The example below shows one way this might be achieved using a customized PSSR software application. 

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