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Root cause analysis/Pareto analysis

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The big picture

Root cause analysis (RCA) is a class of problem-solving methods aimed at identifying the root causes of problems or events. It is based on the Ishikawa diagram (also fishbone diagram, or cause and effect diagram) named after its founder Kaoru Ishikawa (Figure 48.1a). The Ishikawa diagram shows the causes of a certain event. It was first used in the 1960s and is considered one of the seven basic tools of quality management, along with the histogram, Pareto chart, check sheet, control chart, flowchart and scatter diagram (Figure 48.1b). This principle is used in a root cause analysis and ...

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