The new method assures that the factual root causes of any events will be adequately identified, and the identified root causes are fully acceptable to the technical experts and convincible to the plant management. HPIP was developed primarily for US regulatory inspectors, oriented to the analysis of the Human Performance related operational events and based on a collection of RCA techniques, a searching system for cause categories, and a group of 6 cause modules with a total of 84 causal factors. These modules include 7 cause categories and about 200 causal factors in tree structures. In determination of the root cause, the RCA experts need to have sufficient expertise and skills to stop the analysis at an appropriate organizational level for making reasonable conclusions. Part I emphasizes the analytical process with steps, while Part II describes in detail the tools with examples.
Users can adopt it as a whole, in part, or customize it easily to meet their own specific needs.