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The Seven Basic Tools of Quality is a designation given to a fixed set of graphical techniques identified as being most helpful in troubleshooting issues related to quality. They are called ''basic'' because they are suitable for people with little formal training in statistics and because they can be used to solve the vast majority of quality-related issues. The seven tools are: *Cause-and-effect diagram (also known as the "fishbone" or Ishikawa diagram) *Check sheet *Control chart *Histogram *Pareto chart *Scatter diagram *Stratification (alternately, flow chart or run chart) The designation arose in postwar Japan, inspired by the seven famous weapons of Benkei. It was possibly introduced by Kaoru Ishikawa who in turn was influenced by a series of lectures W. Edwards Deming had given to Japanese engineers and scientists in 1950. At that time, companies that had set about training their workforces in statistical quality control found that the complexity of the subject intimidated the vast majority of their workers and scaled back training to focus primarily on simpler methods which suffice for most quality-related issues. The Seven Basic Tools stand in contrast to more advanced statistical methods such as survey sampling, acceptance sampling, statistical hypothesis testing, design of experiments, multivariate analysis, and various methods developed in the field of operations research. The Project Management Institute references the Seven Basic Tools in A Guide to the Project Management Body of Knowledge as an example of a set of general tools useful for planning or controlling project quality. ==Examples== File:Cause and effect diagram for defect XXX.svg|Cause-and-effect diagram File:Check sheet for motor assembly.svg|Check sheet File:C control chart.svg|Control chart File:Histogram of arrivals per minute.svg|Histogram File:Pareto chart of titanium investment casting defects.svg|Pareto chart File:Scatter diagram for quality characteristic XXX.svg|Scatter diagram File:LampFlowchart.svg|Flow chart File:ProcessCapabilityExample.svg|Run chart 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Seven Basic Tools of Quality」の詳細全文を読む スポンサード リンク
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