6. Generalize for large production runs
The examples we have taken are typical of process monitoring indicators (in the ISO 9001 sense), or global production indicators.
The technique described remains valid, but would become tedious for the observation of large-scale processes. In this case, the best approach is to set up the process using the technique described, on 100 to 1,000 samples, identify and deal with special causes of variation, and once the process is stable, carry out only periodic monitoring of the process on small samples (typically 3 to 10 parts). This periodic monitoring ensures that the process remains stable (and therefore predictable): this is Statistical Process Control (SPC), described in the...
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Generalize for large production runs
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Bibliography
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Bibliography
Deming, Hors de la Crise , Éditions Economica
Shewhart, Les fondements de la maîtrise de la qualité , Éditions Economica
Wheeler, Understanding variations , Éditions SPC Press (Very didactic book, detailing concrete examples from the management of industrial companies. I have borrowed from this author the terms "natural process limits",...
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Association française Edwards Deming
Website of the Association Française Edwards Deming. This site offers a biography of Deming, as well as a series of free resources on Deming: a selection of articles, e-books and statistical software. You'll also find a French translation of Western Electric's Manual of Statistical Quality Control....
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