The Seven Quality Control Tools (7QC)
7QC Tools are featured in the
|[pic] |Memory Jogger™ II, | | |A Pocket Guide of Tools for Continuous Improvement & | | |Effective Planning. | |See other products from GOAL/QPC |
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Cause and Effect Diagram
The cause and effect diagram is also called the fishbone chart because of its appearance and the Ishakowa chart after the man who popularized its use in Japan. Its most frequent use is to list the cause of particular problems. The lines coming off the core horizontal line are the main causes and the lines coming off those are sub causes.
The run chart shows the history and pattern of variation. It is helpful to indicate on the chart whether up is good or down is good. This tool is used at the beginning of the change process to see what the problems are. It is used at the end (check) part of the change process to see whether the change has resulted in a permanent improvement. [pic]
The scatter diagram shows the pattern of relationship between two variables that are thought to be related. For example is their a relationship between out side temperature and cases of the common cold? As temperatures drop, do colds increase. The closer the points hug a diagonal line the more closely there is a one to one relationship. [pic]
The flowchart lists the order of activities. The circle symbol indicates the beginning or end of the process. The box indicates action items and the diamond indicates decision...
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