Performance Evaluation of Variable Sampling Intervals Control Charts by Simulation
Journal Title: International Journal of Applied Engineering Research and Development (IJAERD) - Year 2019, Vol 9, Issue 1
Abstract
The main goal of the wide use of quality control charts is to watch the production process and find any change in the quality of its outputs that can be obtained over time. One of the main defects of Shewhart charts is its relatively slow reaction to the small shifts that occur for the mean of production process[1].Recently, new modifications for the control chart idea have been developed to improve the chart ability; these modifications are based on changing the sampling interval. The basic consideration of variable sampling intervals (VSI) control charts is that after the sample is drawn, the time period for withdrawal of another sample should be short if there is evidence of a change in the production process, and long if there is no evidence of any change. In this research, VSI control chart has been considered for evaluation based on the comparison with the traditional one. Different models have been proposed to study; the pattern of process shift is the main difference between the models of the study, and the simulation used here as an effective tool to evaluate the performance of the VSI control charts. The results of the simulation study are presented and analyzed, If the process shifts are assumed to be a linear time series function, and the time of shift occurrence is zero, then the VSI features will become more effective for the quick detection of process shifts than the traditional fixed sampling intervals (FSI) at low and moderate levels also the conclusions have been drawn and the recommendations for the future work are presented
Authors and Affiliations
Tariq Mohammed Ali Ali
Keywords
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- EP ID EP603195
- DOI 10.24247/ijaerdjun20191
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