Variation and special causes of variation

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Reference no: EM13103749

1. What is the difference between common causes of variation and special causes of variation?

2. What should be done to improve a process when special causes of variation are present?

3. What should be done to improve a process when common causes of variation are present?

4. What is the difference between attribute control charts and variables control charts?

5. Why are the range and X charts used together?"

Reference no: EM13103749

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