Fault Tree Analysis process flow

The Process Hazards Analysis team takes a systematic approach to identify potential process hazards and to document them [51]. The Hazardous-Operation Analysis (Haz-Op) is a method by which the process procedures, process and instrument diagrams, and process flow diagrams are evaluated for operability and safety. Fault-Tree Analysis (FTA) is also a method, which investigates the assessment of what-if scenarios and failure conditions. The outcomes of this analysis are recommendations for the col-... 

The preceding is just an example to show how Little JIL can be applied in a manufacturing process. In tbe example, it is only one failure mode and type has been depicted. Tbere could be a large number of failure modes/artifact-related failure modes or can easily be turned into artifact-related failure modes. Also, if a step is done incorrectly, one would expect that failure to be evident in one or more of the out artifacts associated with that step. For detailed and effective analysis, an artifact flow graph (AFG) may be developed from by traversing the process tree with necessary algorithm. Derived FMEA information is obtained from AFG. When the system is large, one may take the help of fault tree analysis (FTA) to determine one failure... 

Next, the analysts consider each of the contributing events in turn and identify the sub-events that lead to them. Regarding an inadequate flow of caustic, we see that it can result from a solution flow rate less than that specified or from too low a concentration of reactant. This process of analysis continues to lower and lower levels until all the base causes are identified. Figure 16.1 is a simplified version of the result. The appearance of the diagram shows why we speak of a fault tree. Note that only one side of the tree is shown. In practice, the other side would also require development. 

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