Results 281 to 290 of about 641,383 (315)

Process capability indices for skewed populations

Quality and Reliability Engineering International, 2002
AbstractThis paper proposes a new method of constructing process capability indices (PCIs) for skewed populations. It is based on a weighted standard deviation method which decomposes the standard deviation of a quality characteristic into upper and lower deviations and adjusts the value of the PCI using decomposed deviations in accordance with the ...
Y.S. Chang, I.S. Choi, D.S. Bai Bai, Do Sun   +2 more
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Impact of multivariate normality assumption on multivariate process capability indices

Communications in Statistics: Case Studies, Data Analysis and Applications, 2019
Process Capability Index (PCI) is a very popular tool for assessing performance of processes (often involving a single quality characteristic). Multivariate process capability indices (MPCI) are comparatively new to the literature and hence often involve
Moutushi Chatterjee
semanticscholar   +1 more source

Three New Multivariate Process Capability Indices

Communications in Statistics - Theory and Methods, 2012
Different multivariate process capability indices are developed by researchers to evaluate process capability when vectors of quality characteristics are considered in a study. This article presents three indices referred to as NCpM, MCpM, and NMC PM in order to evaluate process capability in multivariate environment.
Mohammad R. Niavarani, Rassoul Noorossana, Babak Abbasi   +2 more
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Measuring Process Capability, Process Capability Indices in Theory and Practice

Journal of Quality Technology, 2000
(2000). Measuring Process Capability, Process Capability Indices in Theory and Practice. Journal of Quality Technology: Vol. 32, No. 1, pp. 85-87.
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Sequential testing of process capability indices

Journal of Statistical Computation and Simulation, 2012
A Process Capability Index (PCI) is a numeric summary that compares the behaviour of a product or process characteristics with engineering specifications. We propose a sequential procedure for testing whether two processes are equally capable by using the PCI (C pm).
Abdulkadir Hussein, S. Ejaz Ahmed, S. Bhatti   +2 more
openaire   +1 more source

A new multiple dependent state sampling plan based on one-sided process capability indices

The International Journal of Advanced Manufacturing Technology, 2023
C. Yen, Chia-Hao Chang, Chun-Chia Lee
semanticscholar   +1 more source

Estimating total and specific process capability indices in three-stage processes with measurement errors

Journal of Statistical Computation and Simulation, 2018
In multistage processes, two kinds of process capability indices (specific and total process capability indices) are defined in each stage. The total process capability index calculates the capability of each stage when it is affected by the previous ...
E. Nikzad, A. Amiri, Farzad Amirkhani
semanticscholar   +1 more source

Basic Process Capability Indices: An Expository Review

International Statistical Review, 2008
Summary A review of the four basic process capability indices has been made. The interrelationship among these indices has been highlighted. Attention has been drawn to their drawbacks. The relation of these indices to the proportion nonconforming has been dwelt upon and the requirement of the adequate sample size has been emphasized.
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Process capability indices

The thesis is introduced and studied the initially capability indices and their youngest indices which appeared for the improvement of capability indices. The majority of the work refers to one-dimensional characteristics of normal distribution, but there is an important reference in multi-dimensional of normal data. In the first chapter we will define
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Fuzzy estimation for process capability indices

Information Sciences, 2007
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Parchami, A., Mashinchi, M.
openaire   +1 more source