Technique of Operations Review TOR

This method was developed in the eariy 1970s by D. A. Weaver of the American Society of Safety Engineers [5, 14], It seeks to identify systemic causes for an adverse incident rather than assigning blame in regard to safety. The method allows workers and management to work jointly to analyze workplace incidents, accidents, and failures. Thus, TOR may simply be described as a hands-on analytical approach for identifying the root system causes of an operation failure [14]. 

The method uses a worksheet that contains simple terms that require yes/ no decisions and is activated by an adverse incident occmring at a certain point in time and location involving certain individuals. Note that TOR is not a hypothetical process and demands a systematic evaluation of the circumstances surrounding the incident under consideration. Ultimately, the method identifies how the organization or company could have prevented the accident. 

Finally, note that the main strength of the TOR is the involvement of line personnel in the analysis. In contrast, its main weakness is that it is an after-the-fact process. 

What are the main objectives of performing fault-tree analysis  

What are the four basic symbols used to construct fault trees  

---