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Article | REF: R290 V2

Statistical process control - Use of control charts

Authors: Françoise BOULANGER, Georges CHÉROUTE, Valérie JOLIVET

Publication date: March 10, 2006, Review date: March 15, 2022 | Lire en français

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    2. Process variability

    The use of simple statistical techniques to manage a manufacturing process enables:

    • to prevent the effects of disruptions rather than suffer them and sort production after the fact;

    • to avoid 100% inspection (inspection of all units produced);

    • to streamline sampling plans (number and frequency of checks) rather than choosing them "based on experience" (often on a whim).

    These statistical techniques use the evaluation method by checking a sample limited to a few units (n) to estimate the average value and dispersion of all units produced. For the selected characteristic X, the value x¯...

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