A Shift in the Center

If Bill’s machine is set up right, for an Average of 20.00mm, Averages of 5 should not vary more than 0.4mm above and below this Center (between 19.60mm and 20.40mm). As long as our Sample Averages vary between these limits we can be reasonably sure that

If Bill’s machine is set up right, for an Average of 20.00mm, Averages of 5 should not vary more than 0.4mm above and below this Center (between 19.60mm and 20.40mm). As long as our Sample Averages vary between these limits we can be reasonably sure that

But… If Bill’s machine setting is 20.40mm, Averages of Samples of 5 will vary 0.4mm on either side of this High Center. There is now a 50:50 chance that any Sample Average will be above 20.40mm.

Of course, there’s the same 50:50 chance that the Sample Average will be BELOW 20.40mm. But… With these Odds in our favour we’re practically certain to get a high Average in the first 2 or 3 Samples.

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The Juran Trilogy	The Deming PDCA Cycle	QMS Implementation	FMEA Information	APQP Information
Auditing Information	8-D Problem Solving	Statistics	Error Proofing (Poka Yoke)	Brainstorming
Identifying Waste	Pull Systems	Lead Time Reduction	Planned Maintenance	Quick Setup
Discovering Change	Process Capability - Cp vs. Cpk	Histogram Animation	Process Loop Animation	Taguchi Loss Function
		Fishbone / Cause and Effects Animation

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