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1 Operations Research and Decisions

1 2017

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A mixed control chart adapted to the truncated life test based on the Weibull distribution

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KHAN N. , ASLAM M. , KIM K.-J. , JUN C.-H.

Operations Research and Decisions

2017

tom 27

nr 1

43-55

The design of a new mixed attribute control chart adapted to a truncated life test has been pre-sented. It was assumed that the lifetime of a product follows the Weibull distribution and the number of failures was observed using a truncated life test, where the test duration was specified as a fraction of the mean lifespan. The proposed control chart consists of two pairs of control limits based on a bi-nomial distribution and one lower bound. The average run length of the chart was determined for vari-ous levels of shift constants and specified parameters. The efficiency of the chart is compared with an existing control chart in terms of the average run length. The application of the proposed chart is dis-cussed with the aid of a simulation study.