Statistics for Six Sigma Made Easy

11.4. WHAT WE HAVE LEARNED IN CHAPTER 11

1. Plotting data is a step needed in implementing many of the Six Sigma tools.

2. Data needed for histograms and standardized normal distribution table analysis are often readily available.

3. Using histograms to compare supposedly similar areas or year-to-year performance helps spot unexpected differences and areas of opportunity. Using the standardized normal distribution table (Figure 11-7) to evaluate data on a normal distribution or to compare two processes with similarly shaped histograms can often help quantify a problem.

4. Excel can be used to make histograms or get normal distribution values.

5. A graphing program may be powerful, but the user needs to fully understand it.

6. You can do real Six Sigma work by using ...