GAQM PPM-001 Exam - Topic 1 Question 135 Discussion

Question

Control chart theory is based on the differentiation of the causes of variations in quality. Variations may be produced by assignable causes. All of the following are examples of assignable causes except:

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A) None of the other alternatives apply (all are examples)

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B) differences among materials.

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C) differences among machines.

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D) differences among workers.

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E) differences in each of these factors over time.