Joint economic design of X̄ and R control charts for processes subject to two independent assignable causes

A model for the joint economic design of X̄ and R control charts is developed. This model assumes that the process is subject to two assignable causes. One assignable cause shifts the process mean; the other shifts the process variance. The occurrence of the assignable cause of one kind does not block the occurrence of the assignable cause of another kind. Consequently, a second process parameter can go out-of-control after the first process parameter has gone out-of-control. A numerical study of the cost surface to the model considered has revealed that it is convex, at least in the interest region.

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Includes bibliographical references.

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Mode of access: Internet.

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Shipping list no.: 2004-0090-P.

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CIS Microfiche Accession Numbers: CIS 88 J841-12

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CIS Microfiche Accession Numbers: CIS 89 J841-8

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CIS Microfiche Accession Numbers: CIS 89 J841-10

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CIS Microfiche Accession Numbers: CIS 89 J841-5

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"June 14, 16, 21, and 23, 1988"--Pt. 2.

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CIS Microfiche Accession Numbers: CIS 87 J841-9

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CIS Microfiche Accession Numbers: CIS 88 J841-1

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CIS Microfiche Accession Numbers: CIS 88 J841-10