Multivariate EWMA Control Chart for Means of Multiple Quality Variableswith Two Sampling Intervals
نویسندگان
چکیده
منابع مشابه
Statistical quality control in micro-manufacturing through multivariate ?-EWMA chart
Micro-manufacturing processes are characterized by high process variability and an increased significance of measurement uncertainty in relation to tight tolerance specifications. Therefore, an approach that separates the superposition of measurement and manufacturing variation is demanded. A novel design for a quality control chart that makes it possible to monitor, control and extract measure...
متن کاملA Directional Multivariate Sign EWMA Control Chart
In many applications the shift directions of observation vectors are limited, which allows focusing detection power on a limited subspace with improved sensitivity. This paper develops a new multivariate nonparametric statistical process control chart for monitoring location parameters, which is based on integrating a directional multivariate spatial-sign test and exponentially weighted moving ...
متن کاملA Multivariate Sign EWMA Control Chart
1 60 2 61 3 62 4 63 5 64 6 65 7 66 8 67 9 68 10 69 11 70 12 71 13 72 14 73 15 74 16 75 17 76 18 77 19 78 20 79 21 80 22 81 23 82 24 83 25 84 26 85 27 86 28 87 29 88 30 89 31 90 32 91 33 92 34 93 35 94 36 95 37 96 38 97 39 98 40 99 41 100 42 101 43 102 44 103 45 104 46 105 47 106 48 107 49 108 50 109 51 110 52 111 53 112 54 113 55 114 56 115 57 116 58 117 59 118 A Multivariate Sign EWMA Control ...
متن کاملPerformance of CCC-r control chart with variable sampling intervals
The CCC-r chart is developed based on cumulative count of a conforming (CCC) control chart that considers the cumulative number of items inspected until observing r nonconforming ones. Typically, the samples obtained from the process are analyzed through 100% inspection to exploit the CCC-r chart. However, considering the inspection cost and time would limit its implementation. In this paper, w...
متن کاملThe Robustness of the Multivariate EWMA Control Chart
Control charts are graphical tools widely used to monitor manufacturing processes to quickly detect any change in a process that may result in a change in product quality. The statistic plotted on a control chart is based on samples of n ≥ 1 observations (rational subgroups) that may be taken at regular sampling intervals. However, there are numerous practical applications using individual obse...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of the Chosun Natural Science
سال: 2012
ISSN: 2005-1042
DOI: 10.13160/ricns.2012.5.3.151