The 7 QC Tools are simple statistical tools used for problem solving. These tools were either developed in Japan or introduced to Japan by the Quality Gurus such as Deming and Juran. In terms of importance, these are the most useful. Kaoru Ishikawa has stated that these 7 tools can be used to solve 95 percent of all problems. These tools have been the foundation of Japan's astomishing industrial resurgence after the second world war.
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Many manufacturing company applied fishbone or Ishikawa diagram to analysis root cause of on-the-floor problems. It is a visual tool to identify, explore and graphically display, all the possible causes related to a problem or condition, to discover its root causes.
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