Question: 3a. i) What is the difference between common causes of variation and special causes of variation? (4 marks) ii) What should be done to improve

3a. i) What is the difference between common

3a. i) What is the difference between common causes of variation and special causes of variation? (4 marks) ii) What should be done to improve a process when special causes of variation are present? (2 marks) iii) What should be done to improve a process when only common causes of variation are present? (2 marks)

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