Statistics for Six Sigma Made Easy

Chapter 19. Comparing Six Sigma Data with Quality Department Data

This chapter applies to someone interfacing Six Sigma data with quality department data. Quality department data are often based on averages rather than individual data points.

This chapter does not include a Six Sigma tool, but it does show how someone can use data collected by quality departments to compare with samples collected doing Six Sigma work. This chapter is primarily for those involved in manufacturing or process work. What you will learn here is that quality department systems often use child distributions based on sample averages and the sigma of multiple sample averages, rather than using the individual data points.

To do statistical analysis, we use data in various ...