{"id":8807,"date":"2025-10-16T14:32:26","date_gmt":"2025-10-16T06:32:26","guid":{"rendered":"https:\/\/www.akademisains.gov.my\/asmsj\/?post_type=article&p=8807"},"modified":"2025-10-16T14:32:26","modified_gmt":"2025-10-16T06:32:26","slug":"a-variable-sampling-interval-side-sensitive-synthetic-coefficient-of-variation-chart","status":"publish","type":"article","link":"https:\/\/www.akademisains.gov.my\/asmsj\/article\/a-variable-sampling-interval-side-sensitive-synthetic-coefficient-of-variation-chart\/","title":{"rendered":"A Variable Sampling Interval Side-sensitive Synthetic Coefficient of Variation Chart"},"content":{"rendered":"

[vc_row][vc_column width=”4\/5″ css=”.asmsj-main-column{padding-bottom:10px !important;}”][vc_row_inner equal_height=”yes” css=”.asmsj-inner-row{margin-bottom:10px !important;}”][vc_column_inner][vc_column_text css=””]\t\t\r\n\t\t

\r\n\t\t\t
<\/div>\r\n\t\t\t
\r\n\t\t\t\t\r\n\t\t\t\t\t\r\n\t\t\t\t\t\t\r\n\t\t\t\t\t\t\t\r\n\t\t\t\t\t\t\r\n\t\t\t\t\t\t\t
Name<\/th>\r\n\t\t\t\t\t\t\tDownloads<\/th>\r\n\t\t\t\t\t\t\tVersion<\/th>\r\n\t\t\t\t\t\t\tOwner<\/th>\r\n\t\t\t\t\t\t\tLast Updated<\/th>\r\n\t\t\t\t\t\t\tFile Size<\/th>\r\n\t\t\t\t\t\t<\/tr>\r\n\t\t\t\t\t<\/thead>\r\n\t\t\t\t\t
\r\n\t\t\t\t\t\t\t\t
\r\n\t\t\t\t\t\t\t\t\t\r\n\t\t\t\t\t\t\t\t\t\t\"PDF\"\r\n\t\t\t\t\t\t\t\t\t\tA Variable Sampling Interval Side-sensitive Synthetic Coefficient of Variation Chart\t\t\t\t\t\t\t\t\t<\/a>\r\n\t\t\t\t\t\t\t\t<\/div>\r\n\t\t\t\t\t\t\t<\/td>\r\n\t\t\t\t\t\t\t
\r\n\t\t\t\t\t\t\t\t<\/i>\r\n\t\t\t\t\t\t\t\t260 downloads<\/small><\/em>\r\n\t\t\t\t\t\t\t<\/td>\r\n\t\t\t\t\t\t\t\r\n\t\t\t\t\t\t\t\t<\/i>\r\n\t\t\t\t\t\t\t\t1.0<\/em>\r\n\t\t\t\t\t\t\t<\/td>\r\n\t\t\t\t\t\t\t\r\n\t\t\t\t\t\t\t\t<\/i>\r\n\t\t\t\t\t\t\t\tikram<\/em>\r\n\t\t\t\t\t\t\t<\/td>\r\n\t\t\t\t\t\t\t\r\n\t\t\t\t\t\t\t\t<\/i>\r\n\t\t\t\t\t\t\t\t16-10-2025 14:27<\/em>\r\n\t\t\t\t\t\t\t<\/td>\r\n\t\t\t\t\t\t\t\r\n\t\t\t\t\t\t\t\t<\/i>\r\n\t\t\t\t\t\t\t\t728 KB<\/em>\r\n\t\t\t\t\t\t\t<\/td>\r\n\t\t\t\t\t\t<\/tr>\r\n\t\t\t\t\t<\/tbody>\r\n\t\t\t\t<\/table>\r\n\t\t\t<\/div>\r\n\t\t<\/div>\r\n\r\n\t\t
\r\n\t\t\t\r\n\t\t\t\t<\/i> Download PDF\r\n\t\t\t<\/a>\r\n\t\t<\/div>\r\n\t\t\t\r\n
\r\n

ASM Sc. J., 20(2), 2025<\/p>\r\n\t\t

Published on October 16, 2025<\/p>\r\n

https:\/\/doi.org\/10.32802\/asmscj.2025.0209<\/a><\/p>\r\n \r\n

Author: <\/strong>Sok Li Lim, Wai Chung Yeong, Michael B.C. Khoo, Neema Ramadhani Mataka and Peh Sang Ng<\/p>\r\n \r\n

Abstract<\/strong><\/p>\r\n\t\t\t

The side-sensitive synthetic chart has been shown to effectively detect changes in the coefficient of variation , though its reliance on fixed sampling intervals may reduce its efficiency when compared to adaptive strategies. This paper aims to improve the chart by incorporating the variable sampling interval (VSI) feature that varies the sampling interval based on the performance of the plotting statistic of the previous sample. Formulae for the average and standard deviation of the time to signal (ATS and SDTS) of the proposed chart are derived, and procedures that optimise the chart\u2019s performance are given. Numerical comparisons reveal that the VSI feature enhances the performance of the side-sensitive synthetic \ud835\udefe chart by resulting in smaller out-of-control ATS values. Furthermore, an actual example is given to illustrate the effectiveness of the proposed chart in detecting out-of-control conditions in practical settings.<\/p>\r\n \r\n

Keywords:<\/strong>\r\n Average time to signal coefficient of variation, side-sensitive, synthetic chart, variable sampling interval <\/p>\r\n <\/div>\r\n\t\r\n\t\r\n\t\r\n\t

\r\n

How to Cite<\/h3>\r\n

\r\n 2025. A Variable Sampling Interval Side-sensitive Synthetic Coefficient of Variation Chart. ASM Science Journal<\/em>, 20(2), 1-12. https:\/\/doi.org\/10.32802\/asmscj.2025.0209<\/a> <\/p>\r\n\r\n

\r\n