This paper studies a single-stage production system, two-stage production system where specification limits are designed for inspection. When quality characteristics fall below a lower threshold or above an upper threshold, a decision is made to rework or scrap the item. The target is to determine the optimum target for a process based on rework or scrap costs. In contrast to previous studies, ...

In this paper, absorbing Markov chain models are developed to determine the optimum process mean levels for both a single-stage and a serial two-stage production system in which items are inspected for conformity with their specification limits. When the value of the quality characteristic of an item falls below a lower limit, the item is scrapped. If it falls above an upper limit, the item is ...

in this paper, absorbing markov chain models are developed to determine the optimum process mean levels for both a single-stage and a serial two-stage production system in which items are inspected for conformity with their specification limits. when the value of the quality characteristic of an item falls below a lower limit, the item is scrapped. if it falls above an upper limit, the item is ...

We consider uniform random permutations in classes having a finite combinatorial specification for the substitution decomposition. These include (but are not limited to) all permutation with number of simple permutations. Our goal is to study their limiting behavior sense permutons. The limit depends on structure restricted families largest growth rate. When it strongly connected, two cases occ...

This article presents the design of integrating Dodge-Romig average outgoing quality limit (AOQL) single sampling plans (SSP) by variables and specification limits. By solving the modified Kapur and Wang’s model, we not only have the economic specification limits, but also obtain the optimal inspection policy of Dodge-Romig AOQL SSP by variables.

Acceptance control charts establish control limits based on specification limits for very capable processes where the mean is permitted to vary. This paper deals with designing such charts when a product has two or more correlated characteristics that must all simultaneously conform to specification limits for the product to be acceptable. We extend past work by solving the general correlated m...

Process capability analysis (PCA) is the ability of a process that measures the degree of providing customer expectations. Generally, the expectations of customer have been defined by using specification limits. A process capability index (PCI) summarizes ability of process to conform specification limits. Generally, this comparison is made by analyzing ratio of specification limits and six-sig...

The properties of Cpmk in the presence of asymmetric specification limits are discussed. It is shown that Cpmk tends to zero as the process variation increases and vice versa. Furthermore, if the process variation is small, Cpmk has its maximum near the target value but the maximum moves towards the specification midpoint as the variation increases. This is a desirable property as for large var...