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Structured Indexing of Process Capability Data
Volume 3: 7th Design for Manufacturing Conference, 2002Process capability data can aid a design through ensuring the part tolerances are achievable with the current manufacturing capability. Many companies want to store process capability data in databases to make it available to all engineers. The success of a process capability database is highly dependent on the design of its structure and a method to ...
Daniel Kern, Anna Thornton
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The process-oriented multivariate capability index
International Journal of Production Research, 2005Recent literature has proposed multivariate capability indices, but does not suggest a method for measuring quality characteristics in a way that links production irregularities directly to their causes. Our objective is to present a new approach to multivariate capability indices that uses process-oriented basis representation (POBREP) which allows ...
E.J. Foster * +4 more
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A new multivariate process capability index
Total Quality Management & Business Excellence, 2017Multivariate process capability indices are applied to account the capability of the processes which the quality of the products depends on two or more related characteristics. We call a tolerance region asymmetric, when the target value of at least one characteristic is not the mid-point of the tolerance interval.
Zainab Abbasi Ganji +1 more
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A Nonparametric Multivariate Process Capability Index
International Journal of Modelling and Simulation, 2001AbstractFor the multivariate manufacturing processes, tremendous difficulties are often encountered when one attempts to measure the process capability by directly extending the univariate approach, that is, comparing the specification limits (tolerance zones) with the actual process spread. In fact, the existing multivariate process capability indices
A.B. Yeh, H. Chen
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Robust process capability index tracking for process qualification
Proceedings of the 2015 International Conference on Microelectronic Test Structures, 2015This paper presents a robust process qualification and monitoring procedure based on the recently developed YAT and YWL process capability indices. Combined with appropriate test structures and measurements the procedure enables rapid process maturity evaluation and on-going loop closure of manufacturing to process specifications.
Cong Gu, Colin C. McAndrew
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Process capability index: bivariate normal distribution
Communications in Statistics - Theory and Methods, 1991In this paper we examine the behaviour of bivariate generalizations of the process capability indices Cp, CPU and CPL. It is shown that when the characteristics of interest have a bivariate normal distribution the distribution of is related to the bivariate χ2 distribution and that of is related to the bivariate noncentral t distribution.
Subrahmaniam Kocherlakota +1 more
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Distributions of the Estimated Process Capability Index Cpk
Economic Quality Control, 2003Summary: Process capability indices \(C_{p}\) and \(C_{pk}\) have been widely used to provide numerical measures on process potential and process performance. While \(C_{p}\) measures process variation relative to the specification tolerance, which only reflects process potential, \(C_{pk}\) considers process variation as well as process centering ...
Lin, G. H., Pearn, W. L.
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Another Look at the Process Capability Index
Quality and Reliability Engineering International, 2006Process capability indices (PCIs) have been widely used in manufacturing industries. In this paper, we take a very specific view that a proper value of the process capacity index (PCI) represents the true yield of the process. Following this logic, a universal PCI, Cy, is proposed and derived.
Min-Te Chao, Dennis K. J. Lin
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ESTIMATION OF PROCESS CAPABILITY INDEX FOR CONCENTRICITY
Quality Engineering, 1997Concentricity of any hollow circular or cylindrical job is a critical quality characteristic whose variation pattern can be explained by an extreme value distribution. Estimation of the process capability index is a prerequisite for control and improvem..
Ashok Sarkar, Surajit Pal
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A Weighting Multivariate Process Capability Index
2010 International Conference on System Science, Engineering Design and Manufacturing Informatization, 2010Process quality ultimately decides on the quality of electronic products. Based on analyzing and improving process capability index (PCI), microelectronics process quality of electronic products may be effectively assured. Nowadays with the rapid development in microelectronics process, Quality evaluation of processes concerns more than one quality ...
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