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Your search keyword '"Gemai Chen"' showing total 5 results
Start Over Author "Gemai Chen" Journal journal of quality technology
5 results on '"Gemai Chen"'

1. EWMA Charts for Monitoring the Mean of Censored Weibull Lifetimes

Author

Lingyun Zhang and Gemai Chen

Subjects
021103 operations research, Strategy and Management, 0211 other engineering and technologies, Exponentially weighted moving average, 02 engineering and technology, Management Science and Operations Research, 01 natural sciences, Censoring (statistics), Industrial and Manufacturing Engineering, 010104 statistics & probability, Statistics, Econometrics, EWMA chart, 0101 mathematics, Safety, Risk, Reliability and Quality, Mathematics, Weibull distribution
Abstract

Lower-sided and upper-sided exponentially weighted moving average (EWMA) charts are developed for detecting mean changes when censoring occurs at a fixed level in processes characterized by Weibull distributions. The lower-sided EWMA chart performs bett..

Published
2004

2. Monitoring Process Mean and Variability with One EWMA Chart

Author

Hansheng Xie, Gemai Chen, and Smiley W. Cheng

Subjects
021103 operations research, Average run length, Computer science, Strategy and Management, 0211 other engineering and technologies, Process (computing), 02 engineering and technology, Management Science and Operations Research, 01 natural sciences, Industrial and Manufacturing Engineering, ComputingMilieux_GENERAL, 010104 statistics & probability, Chart, Statistics, Control chart, EWMA chart, 0101 mathematics, Safety, Risk, Reliability and Quality
Abstract

Two EWMA charts are usually required to monitor both process mean and variability. In this paper, we propose a new EWMA chart which effectively combines the usual two EWMA charts into one chart. In...

Published
2001

3. An ImprovedpChart Through Simple Adjustments

Author

Gemai Chen

Subjects
Strategy and Management, X-bar chart, Normal values, Management Science and Operations Research, Industrial and Manufacturing Engineering, Large sample, Binomial distribution, Statistics, Control chart, Fraction (mathematics), False alarm, Safety, Risk, Reliability and Quality, p-chart, Mathematics
Abstract

The p chart for monitoring the fraction, p, of nonconforming products requires very large sample sizes to achieve any power in detecting decreases in p, and the false alarm for probabilities differ considerably from the nomial normal values. Two alterna..

Published
1998

4. A General Purpose Approximate Goodness-of-Fit Test

Author

Narayanaswamy Balakrishnan and Gemai Chen

Subjects
021103 operations research, Strategy and Management, media_common.quotation_subject, Monte Carlo method, 0211 other engineering and technologies, Sample (statistics), 02 engineering and technology, Management Science and Operations Research, 01 natural sciences, Industrial and Manufacturing Engineering, Test (assessment), 010104 statistics & probability, Goodness of fit, Statistics, Econometrics, Data analysis, Quality (business), 0101 mathematics, Safety, Risk, Reliability and Quality, Reliability (statistics), media_common, Statistical hypothesis testing, Mathematics
Abstract

Skewed distributions play an important role in the analysis of data from quality and reliability experiments. Very often unknown parameters must be estimated from the sample data in order to test whether the data has come from a certain family of distri..

Published
1995

5. An improved p chart through simple adjustments.

Author

Gemai Chen

Subjects
FRACTIONS
Abstract

Proposes a chart for an improved monitoring of the p fraction. Two alternatives to the p chart; Guidelines for choosing an appropriate chart; Advantages of simple adjustments; Explanation of T.P. Ryan's rule of thumb.

Published
1998
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