896 resultados para Number of non-conformities of the inspected item
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"Errata": 1 p. atend.
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Title page and half-title not included in paging.
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Includes indexes.
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"Recommendations": prelim. leaves 2-4.
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"(Mr. Barkly)."
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Illustrated by numerous engravings.
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Reply to Louis Hue Girardin's "Pulaski vindicated from an unsupported charge inconsiderately or malignantly introduced in Judge Johnson's Sketches of the life and correspondence of Major Gen. Nathaniel Greene."
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The procedure for online process control by attributes consists of inspecting a single item at every m produced items. It is decided on the basis of the inspection result whether the process is in-control (the conforming fraction is stable) or out-of-control (the conforming fraction is decreased, for example). Most articles about online process control have cited the stoppage of the production process for an adjustment when the inspected item is non-conforming (then the production is restarted in-control, here denominated as corrective adjustment). Moreover, the articles related to this subject do not present semi-economical designs (which may yield high quantities of non-conforming items), as they do not include a policy of preventive adjustments (in such case no item is inspected), which can be more economical, mainly if the inspected item can be misclassified. In this article, the possibility of preventive or corrective adjustments in the process is decided at every m produced item. If a preventive adjustment is decided upon, then no item is inspected. On the contrary, the m-th item is inspected; if it conforms, the production goes on, otherwise, an adjustment takes place and the process restarts in-control. This approach is economically feasible for some practical situations and the parameters of the proposed procedure are determined minimizing an average cost function subject to some statistical restrictions (for example, to assure a minimal levelfixed in advanceof conforming items in the production process). Numerical examples illustrate the proposal.