7 Quality Control Tools

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Seven Quality Control Tools

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1. 2. 3. 4. 5. 6. 7.

Pareto analysis Flowcharts Check sheets Histograms Scatter diagrams Control charts Fishbone diagram

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Vilfredo Pareto was an Italian economist who noted that approximately 80% of wealth was owned by only 20% of the population. This was true in almost all the societies he studied.

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1. Pareto analysis
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Choosing the Most Important Changes to Make Pareto analysis is a very simple technique that helps you to choose the most effective changes to make. It uses the Pareto principle - the idea that by doing 20% of work you can generate 80% of the advantage of doing the entire job. Pareto analysis is a formal technique for finding the changes that will give the biggest benefits. It is useful where many possible courses of action are competing for your attention.

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It is a statistical technique in decision making that is used for selection of a limited number of tasks that produce significant overall effect. It uses the Pareto principle - the idea that by doing 20% of work you can generate 80% of the advantage of doing the entire job.
Or in terms of quality improvement, a large majority of problems (80%) are produced by a few key causes (20%).
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Pareto analysis is a formal technique useful where many possible courses of action are competing for your attention. Basically, it consists of estimating the benefit delivered by each action with subsequent selection of a number of the most effective actions that deliver the total benefit reasonably close to the maximum possible one.

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Write out a list of the changes you could make. If you have a long list, group it into related changes. Then score the items or groups. The scoring method you use depends on the sort of problem you are trying to solve.

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