8.3. PROCESS OFF-CENTER
Is the problem that the process is off-center? For example, are you worried about machined shaft diameters where the initial data indicate that on the average they run too large? Is the problem that all order takers are consistently making too many errors? Are almost all orders on a product being filled late? If a problem is of this nature, then you have a problem that perhaps is best addressed by improving the whole process, not focusing on the variation caused by the exception mini-populations. If this is the case, it makes collecting samples/data and measuring change a lot easier than if you had to gather samples/data on each peculiar part of the population.
When attempting to measure your success on centering a process ...
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