Appendix A. APPENDIX A The Six Sigma Statistical Tool Finder Matrix
Look in the Need and Detail columns in the matrix below to identify the appropriate Six Sigma Tool.
| Need | Detail | Six Sigma Tool | Location |
|---|---|---|---|
| address customer needs by identifying and prioritizing actions | convert qualitative customer input to specific prioritized actions | simplified QFD | Chapter 3 |
| minimize collateral damage due to a product or process change | convert qualitative input on concerns to specific prioritized actions | simplified FMEA | Chapter 4 |
| identify key process input variables (KPIVs) | use expert input on a process use historical data | cause-and-effect fishbone correlation tests | Chapter 5 Chapter 7 |
| pinpoint possible problem areas of a process | use expert input | process flow diagram | Chapter 6 |
| verify measurement accuracy | determine if a gauge is adequate for the task | simplified gauge verification | Chapter 9 |
| calculate minimum sample size | variables (decimal) data proportional data | sample size—variables sample size—proportions | Chapter 12 Chapter 13 |
| determine if any statistically significant change on variables (decimal) data | compare a sample with historical (population) data |
| Chapter 11 Chapter 12 |
| compare two samples to each other |
| Chapter 11 Chapter 12 | |
| determine if any statistically significant change on proportional data | the mathematical probability of the population is known
compare a sample with a population where both proportions are calculated compare two samples where both proportions are calculated | Excel's BINOMDIST
sample/population formula sample/sample formula | Chapter 10 Chapter 13 |
| minimize process defect excursions | applicable to variables (decimal) data | simplified control charts | Chapter 16 |
| optimize key process input variable settings (KPIVs) | use on a current process | simplified DOE | Chapter 15 |
| determine if tolerances are appropriate | how were tolerances determined? are any stacked parts with tolerances at worst case? | need-based tolerances RSS tolerances | Chapter 17 Chapter 17 |
| identify variation contributed by each component to the process or assembly variation | identifies problem components | simplified transfer function | Chapter 18 |
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