Performance Analysis Of The Approximately Unbiased Estimator Of Process Capability Index Cpk
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Performance Analysis Of The Approximately Unbiased Estimator Of Process Capability Index Cpk
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Author :
language : en
Publisher:
Release Date : 2018
Performance Analysis Of The Approximately Unbiased Estimator Of Process Capability Index Cpk written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018 with categories.
Performance Analysis Of The Approximately Unbiased Estimator Of Process Capability Index Cpk
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Author :
language : en
Publisher:
Release Date : 2018
Performance Analysis Of The Approximately Unbiased Estimator Of Process Capability Index Cpk written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018 with categories.
An Approximately Unbiased Estimator Of Process Capability Index Cpk
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Author :
language : en
Publisher:
Release Date : 2016
An Approximately Unbiased Estimator Of Process Capability Index Cpk written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with categories.
An Approximately Unbiased Estimator Of Process Capability Index Spk
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Author :
language : en
Publisher:
Release Date : 2016
An Approximately Unbiased Estimator Of Process Capability Index Spk written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with categories.
An Approximately Unbiased Estimator Of Process Capability Index Cpm
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Author :
language : en
Publisher:
Release Date : 2016
An Approximately Unbiased Estimator Of Process Capability Index Cpm written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with categories.
Encyclopedia And Handbook Of Process Capability Indices A Comprehensive Exposition Of Quality Control Measures
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Author : Wen-lea Pearn
language : en
Publisher: World Scientific
Release Date : 2006-05-16
Encyclopedia And Handbook Of Process Capability Indices A Comprehensive Exposition Of Quality Control Measures written by Wen-lea Pearn and has been published by World Scientific this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006-05-16 with Technology & Engineering categories.
This unique volume provides an up-to-date and detailed description of the various process capability indices widely (and sometimes misleadingly) used in the applications at production sites. The authors, who are internationally recognized experts in this area with numerous contributions to the field, provide a lucid exposition, which covers all the main aspects, developments and advances.The concept of Process Capability Index (PCI) is barely 20 years old, but the multitude of available versions can overwhelm even the most seasoned practitioner. The organized and self-contained presentation of the material starting from 1980's primitive indices (Cp and Cpk) up to the newly proposed indices for the cases of multiple dependent characteristics results in an authoritative and indispensable reference.A proper balance between theoretical investigation and “rule-of-thumb” practical procedures is maintained in order to eliminate the tensions among various methodologies of assessing the capability of industrial processes.
Approximately Unbiased Estimator For Non Normal Process Capability Index Cnpk
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Author : W. L. Pearn
language : en
Publisher:
Release Date : 2014
Approximately Unbiased Estimator For Non Normal Process Capability Index Cnpk written by W. L. Pearn and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014 with Bootstrap categories.
Process capability indices (PCIs) have been extensively used to evaluate and measure whether the process meets the specifications and they provide quality assurance and guide a principal for quality improvement. The index Cpk is the most popular index and is widely used in the manufacturing industry for manufacturing yield evaluation. However, typical evaluations of Cpk depend heavily on the assumption of normal variability. When the underlying distributions are non-normal, the capability evaluations are highly unreliable. In the paper, we apply four various bootstrap methods to construct lower confidence bounds of CNpk for non-normal processes. We also propose an approximately unbiased estimator of CNpk for the non-normal processes. Comparisons among the four bootstrap methods with different estimators are provided.
Handbook Of Multivariate Process Capability Indices
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Author : Ashis Kumar Chakraborty
language : en
Publisher: CRC Press
Release Date : 2021-01-06
Handbook Of Multivariate Process Capability Indices written by Ashis Kumar Chakraborty and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-01-06 with Business & Economics categories.
Providing a single-valued assessment of the performance of a process is often one of the greatest challenges for a quality professional. Process Capability Indices (PCIs) precisely do this job. For processes having a single measurable quality characteristic, there is an ample number of PCIs, defined in literature. The situation worsens for multivariate processes, i.e., where there is more than one correlated quality characteristic. Since in most situations quality professionals face multiple quality characteristics to be controlled through a process, Multivariate Process Capability Indices (MPCIs) become the order of the day. However, there is no book which addresses and explains different MPCIs and their properties. The literature of Multivariate Process Capability Indices (MPCIs) is not well organized, in the sense that a thorough and systematic discussion on the various MPCIs is hardly available in the literature. Handbook of Multivariate Process Capability Indices provides an extensive study of the MPCIs defined for various types of specification regions. This book is intended to help quality professionals to understand which MPCI should be used and in what situation. For researchers in this field, the book provides a thorough discussion about each of the MPCIs developed to date, along with their statistical and analytical properties. Also, real life examples are provided for almost all the MPCIs discussed in the book. This helps both the researchers and the quality professionals alike to have a better understanding of the MPCIs, which otherwise become difficult to understand, since there is more than one quality characteristic to be controlled at a time. Features: A complete guide for quality professionals on the usage of different MPCIs. A step by step discussion on multivariate process capability analysis, starting from a brief discussion on univariate indices. A single source for all kinds of MPCIs developed so far. Comprehensive analysis of the MPCIs, including analysis of real-life data. References provided at the end of each chapter encompass the entire literature available on the respective topic. Interpretation of the MPCIs and development of threshold values of many MPCIs are also included. This reference book is aimed at the post graduate students in Industrial Statistics. It will also serve researchers working in the field of Industrial Statistics, as well as practitioners requiring thorough guidance regarding selection of an appropriate MPCI suitable for the problem at hand.
Estimation Of A Modified Capability Index For Non Normal Distributions
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Author : W. L. Pearn
language : en
Publisher:
Release Date : 2016
Estimation Of A Modified Capability Index For Non Normal Distributions written by W. L. Pearn and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with Curve fitting categories.
Process capability indices (PCIs), which are very important in quality control have been one of a numerical measure index in manufacturing processes. Index Cpk is the most popular one used in the manufacturing industry. It is applied under the assumption that the processes are normally distributed. In real-world applications, non-normal processes may occur in industries, and the index CNpk has been proposed for non-normal processes in which its exact sampling distribution is mathematically intractable. Quality practitioners commonly use the existing NCPPM (non-conformities in parts per million) table of Cpk to obtain process yields. However, the table could not be applied directly via the value of index CNpk. For the consistency of NCPPM mapping, we propose procedures to obtain the modified index C*Npk and its approximately unbiased estimator C?*Npk for three non-normal distributions, involving Log-normal, Gamma, and Weibull distributions. The values of modified index C*Npk could be used to inquire the existing popular NCPPM table of Cpk. In addition, four bootstrap methods were used to construct the lower confidence bounds of the index C*Npk, which are useful to the practitioners for making reliable decisions regarding process performance based on process yield.
Process Performance Evaluation With Imprecise Information
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Author : Chien-Wei Wu
language : en
Publisher:
Release Date : 2010
Process Performance Evaluation With Imprecise Information written by Chien-Wei Wu and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with Decision making categories.
Process capability indexes have been widely used in the manufacturing industry for measuring process performance. Most studies on assessing the process capability are based on crisp estimates of process capability indexes while assuming output measurements of the process being precise number. However, in practical situations it is much more realistic that the output characteristics of continuous quantities are more or less imprecise in general. The fuzziness and stochastic uncertainty are unavoidable features of collected observations from continuous quantities. To assess the process performance more accurately, we consider the capability index CPMK, which is recognized as the most useful index to date for assessing the process capability with two-sided specification limits. We construct the fuzzy estimator for the index CPMK according to the fuzzy set theory. To make reliable decisions, we propose a decision rule to assess the process capability based on the fuzzy lower confidence bound of CPMK. A step-by-step procedure for testing process capability is provided for easy execution in practical situations. An example of manufacturing silicon wafers is also presented to illustrate the applicability of the proposed approach.