Technic of Operations Review TOR

This method was developed in the early 1970s by D. A. Weaver of the American Society of Safety Engineers to identify systemic causes rather than assigning blame in regard to safety [26]. TOR may be described as a 

The basis for the activation of this approach is an incident occurring at a certain place and time involving certain individuals. The following eight steps are used in this approach [26,27]  

Just like any other safety analysis method, the TOR has its strengths and weaknesses. Its main strength is the involvement of line personnel/people in the analysis, and its main weakness is its after-the-fact process. 

In 1987, D. A. Weaver developed the Technic of Operations Review (TOR) (Ferry, 1988). It was designed to uncover management oversights and omissions instead of hardware or operator problems. The four steps of a TOR analysis are state, trace, eliminate, and seek. 

During the state portion of the analysis, detailed information about the hazard is gathered. If the hazard is discovered as the result of an accident, a summary of the mishap report is reviewed. 

The trace portion uses a sheet displaying possible operational errors under eight categories  

Under each category is a list of numbered operational errors in that group. (A complete copy of the TOR analysis materials can be obtained from The FPE Group, 3687 Mt. Diablo Road, Lafayette, CA 94549, who are the sole distributors of this analysis instrument.) 

Deficient inspection, report, or maintenance (main category control). 

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