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Sustaining Gains: Other Control Techniques
Pre-Control
Statistical Process Control (SPC) has been one of the most favorite topics of discussion among quality professionals. A very large number of articles and books have been published on this subject. There is, however, one technique that finds very little or no reference at all in the material published so far on SPC and that is pre-control (PC). Perhaps this is so because it is too simple to understand and equally simple to implement. Pre-control is a technique that is easily understood by shop operators and it enables them to control the process so that defective parts are not produced. Although simple to understand, pre-control is a statistically robust technique. Unlike SPC, where we ...
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