System Checklists

A system checklist is useful to identify compliance problems and also tliose areas of die system diat require furdier hazard evaluation. The niediod is easy to use and can be applied to any component of a given system such as equipment, instrunientation, materials, and procedures. Tliis mediod, which produces qualitative results, must be prepared by an engineer dioroughly experienced with die system once die checklist is prepared, however, it can be used by engineers or managers who may have less tecluiical experience widi die system.  

Contingency planning (both persoiuicl and community) Waste disposal 

Each specific area mentioned above can be further expanded to provide more details for Imzcird evaluation. For example, tlie design engineer might preptue die following checklist to gain more insight into die liazards posed by the raw materials  

Is die material pyrophoric (i.e., can it catch fire upon contact widi air ) 

Whal are tlie exposure liinils for tlie material e.g., threshold limit values (TLV), permissible exposure limit (PEL), recommended exposure limit (REL), 

Does tlie material undergo liazardous polymerization  

Intermediate products Equipment Instrumentation Plant layout Start-up Shut down 

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A written list of items or procedures describe prevents chlorine gas flow unievt tin-m ih.-the status of a system. Checklists may vary venturi is sub-atmospheric, u the fu-,i ir-c -considerably in level of detail, depending on the fans, thwnne .,-uua... 

Advanced product qualify planning and control plan reference manual ANFIA evaluation of quality systems - checklist ANFIA evaluation of quality systems - guidelines for use Benchmarking, Sylvia Coding (Gower, 1998)... 

These checklists may be used to indicate compliance with standard procedures. As indicated above, a checklist is easy to use and can be applied to each stage of a project of plant development. A checklist is a convenient means of communicating die minimal acceptable level of liazard evaluadon diat is required for any Job, regardless of scope. As such, it is particularly useful for an inexperienced engineer to work tlirougli die various requirements in the checklist to reach a satisfactory conclusion. However, a system checklist should be audited and updated regularly. 

Ill order to determine wliat safety questions must be asked, a system checklist that can be used to identify possible safety issues should be created. There arc a number of basic issues that can be included on tlie list, including flamuiabilily, toxicity, storage and reactivity. 

Here is a troubleshooting checklist on refrigeration. Source GPSA Engineering Data Book, Gas Processors Suppliers Association, 10th Ed. Refrigeration System Checklist ... 

How known risks are prevented from actuahsing. This fimction deals with the provision and implementation of barriers (e.g. quahty assurance, back-up systems, checklists and physical barriers) to prevent rmwanted human and technical variance. 

Figure 2.6.3 Example of local management system checklist for a call centre...

The purpose of the hazards checklist is to prevent hazards in a new project that are similar to hazards already known in other systems. Checklist questions are derived from existing hazards, asking for the root cause mechanisms of those hazards. For every product family the applicability of the checklist questions is decided. All applicable questions have to be answered prior to a product release to increase the awareness of the developers of the possible problems and to avoid their inplemen-tation. 

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