Читать книгу Statistical Quality Control - Bhisham C. Gupta - Страница 61

1 In which phase of the Six Sigma project does the team identify root causes of the problem?

2 A well‐behaved process is currently running at a 5σ level. What is the expected number of defects per million opportunities (DPMO) if the mean of the process shifts by 1.5 standard deviations?

3 Using the Six Sigma methodology, a team improves a process, bringing the sigma level from up 1σ to 3σ. What is the resulting change in the long‐term defect rate?

4 In what ways is Six Sigma similar to other quality initiatives?

5 In what ways is Six Sigma different from other quality initiatives?

6 List and explain the differences between the goals of Six Sigma and the goals of Lean.

7 What is the main difference between the Basic 7 tools and the New 7 Tools?

8 Think of the last time you bought lunch at a fast‐food restaurant. Use the Eight Wastes as a guide to identify wastes that you observed.

9 In what way is the Control phase of the DMAIC cycle similar to the last stage of the 5S method?

10 Give three examples of mistake‐proofing devices that can be found in everyday life. For each, indicate whether the mistake‐proofing feature is a control or warning, or if it completely eliminates the mistake.