![]() ![]() The VSSI X chart shows better performance in detecting moderate mean shift. Performance of these control charts is presented in the form of ATS (Average Time to Signal which is obtained from computer simulation and markov chain approach. The performance of VSSI X chart is compared with those of Shewhart X chart, VSS X chart (Variable Sample Size X chart and VSI X chart (Variable Sampling Interval X chart. X chart with variable sample size and sampling interval (VSSI X chart is proposed to enhance the ability of detecting moderate to small process shift. PETA KENDALI X DENGAN UKURAN SAMPEL DAN INTERVAL PENGAMBILAN SAMPEL YANG BERVARIASIĭirectory of Open Access Journals (Sweden)įull Text Available Shewhart X chart is widely used in statistical process control for monitoring variable data and has shown good performance in detecting large mean shift but less sensitive in detecting moderate to small process shift. ![]()
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