Simple/Short Form PSSR

Step 3 - Determine the type of PSSR to perform - Simple/Short Form or Complex/Long Form. 

The following example of a basic priority risk-ranking matrix system is provided to display one tool for determining whether the change or trigger event is simple - and able to use a short form PSSR - or more complex, thus in need of a long form PSSR. 

The term simple should not be misunderstood as we use it in this book. It does not mean this category of PSSR is less important than a complex PSSR. It is intended to indicate the level of effort needed is well understood and fairly straightforward. Whenever we use the terms simple PSSR or short-form PSSR, they indicate a less resource-intensive approach to verifying readiness for startup when the trigger event has a lower level of risk. 

For Simple PSSRs use form FRM1 - PSSR Short Form... 

For example, a two-person team, the PSSR team leader and one member, may be all the signature authority needed to sign off on a PSSR short form if signatures are required by your site policy. An example form is shown in Table 4.2 -Example short form for lower risk / simple PSSR. 

TABLE 4-2 Example short form for lower risk / simple PSSR... 

Here are two examples of using a risk-based approach in PSSR. The first uses the simple PSSR short form. The second example discusses using the PSSR long form. 

Here is where the risk-based approach necessitates a first look at the nature of the trigger event. By following some of the guidelines in Chapter 4, the type of PSSR to design is relatively easily divided into simple or complex - that is, a short form or a long form respectively. However, when the PSSR long form is indicated, there are numerous decisions to make about the pre-startup safety review s needs. 

PSSR Short Form - This form is to be used for simple modifications where a PSSR is required due to minor changes in process safety information. A guideline for when to use this form is if a MOC for the modification s hazard review was able to be completed without using a process hazard analysis. 

On the PSSR short form for simple trigger events, a date in the date resolved box and initials in the initials box indicates that an item is satisfactory or that the issue has been corrected or resolved or a recommendation is closed. 

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