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Setting the Process Aim, Part 2

Making appropriate adjustments

Donald J. Wheeler
Mon, 06/01/2020 - 12:03
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All articles in this series
Setting the Process Aim, Part 1
Setting the Process Aim, Part 2
Body

Setting the process aim is a key element in the short production runs that characterize the lean production of multiple products. Last month in part one we looked at how to use a target-centered XmR chart to reliably set the aim. This column will describe aim-setting plans that use the average of multiple measurements.

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The necessity of process predictability

All effective aim-setting procedures will be built upon the notion of a process standard deviation. Some estimate of this process dispersion parameter will be used in determining the decision rules for adjusting or not adjusting the process aim. When a process is operated predictably this idea of a single dispersion parameter makes sense.


Figure 1: When statistics serve as estimates

 …

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