Accession Number : ADP007209

Title :   Control Charts Under Linear Trend,

Corporate Author : NATIONAL UNIV OF SINGAPORE DEPT OF MATHEMATICS

Personal Author(s) : Gan, F. F.

Report Date : 1992

Pagination or Media Count : 3

Abstract : The performance of control charts is usually evaluated by assuming a step change in the process mean. However, it is more appropriate to evaluate the performance of control charts by assuming a drift in the mean for processes where a gradual drift models the shift in the mean more accurately. Three major methods for computing the average run length (ARL) of control charts assuming a step change in the mean are reviewed. Generalizations of these methods for computing the ARL of control charts assuming a drift in the mean are then examined. Average run length; Cumulative sum; Exponentially weighted moving average; Integral equation; Linear drift; Markov chain; Normal distribution; Statistical process control.

Descriptors :   *INTEGRAL EQUATIONS, CHAINS, CHARTS, CONTROL, DISTRIBUTION, DRIFT, EQUATIONS, INTEGRALS, LENGTH, MEAN, MODELS, NORMAL DISTRIBUTION, PROBABILITY.

Subject Categories : Statistics and Probability

Distribution Statement : APPROVED FOR PUBLIC RELEASE