8.6. IMPORTANCE OF GETTING GOOD SAMPLES AND DATA
Minimum sample sizes, simplified gauge verification, and statistical tests to validate significant change all play a part. But the sample/data collection must be right to start with, so you have data to analyze that are truly representative of the process you are checking.
While testing, collecting data, and validating the process improvement, you and others must be alert for any event that makes your conclusions suspicious. When in doubt, don't believe the results. Redo the test!
The use of good problem definition and the fishbone diagram to help decide what to sample is valid for many applications.
Sales managers, store salespeople, distribution center employees, and others can assist in doing ...
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