Hoffman (2001) Obtaining Confidence Intervals For Cpk Using Percentiles of the Distribution of Cp

getCITED

Home Search Add Content Reports Help

Edit Publication | Edit Contributors | Delete Publication | Edit References | Edit Citations

Add to Bookstack | Show Bookstack | Change Bookstack

Obtaining Confidence Intervals For Cpk Using Percentiles of the Distribution of Cp

Post a Comment

CONTRIBUTORS:

Author:

Hoffman, Lorrie L (Armstrong Atlantic State University)

JOURNAL:

Quality and Reliability Engineering International, 17(??), 113 - 118.

YEAR:

2001

PUB TYPE:

Journal Article

SUBJECT(S):

quality control

DISCIPLINE:

Statistics

HTTP:

http:// http://www3.interscience.wiley.com/cgi-bin/issuetoc?ID=77502203

LANGUAGE:

English

PUB ID:

103-409-745 (Last edited on 2004/11/19 19:17:13 US/Mountain)

SPONSOR(S):

ABSTRACT:
t Cpk is used as an estimate of process capability and can reflect performance degradation due to both shifts in the process mean and variability. Exact upper and lower confidence limits for the actual parameter value are elusive. Objections to existing estimators focus on two areas: the difficulty of executing the needed computations and the excessive widths of those confidence bounds. The CPE estimator (so called since it relies on Cp ) which we derive in this paper is formed by simply multiplying Cpk by a value from the inverse chi-square distribution. A PASCAL computer program is supplied which generates those percentiles. Our CPE is compared via simulation to other estimators and is shown to be the preferred selection in most cases by providing the requisite probability coverage and narrow interval widths. Copyright © 2001 John Wiley & Sons, Ltd.

STATISTICS

Click on # to view
Citations		0
References		0
Comments		0
Quality		0/0.00
Interest		0/0.00
View(er)s		2/188

Quality
	N/A
High
	7
	6
	5
	4
	3
	2
	1
Low

Interest
	N/A
High
	7
	6
	5
	4
	3
	2
	1
Low

Prev | Next