منابع مشابه
An improved double sampling s chart
Double sampling (DS) s charts are designed to allow quick detection of a small shift in process standard deviations and to provide a quick response in an agile manufacturing environment. However, current developed DS s charts assume that the sample standard deviations follow a normal distribution. Although valid for relatively large sample sizes, this assumption has limited the application of D...
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 کاملan economic design of combined double sampling and variable sample size x ̅ control chart
abstract. in recent years several studies have shown that control charts with adaptive schemes or double sampling plans detect both small and moderate shifts in the process mean more quickly than the traditional shewhart chart. in the classical double sampling chart, the difference between two points were placed in the central region of first stage was not considered. in this study, a new co...
متن کاملEfficient Selection of Design Parameters in Multi-Objective Economic-Statistical Model of Attribute C Control Chart
Control chart is the most well-known chart to monitor the number of nonconformities per inspection unit where each sample consists of constant size. Generally, the design of a control chart requires determination of sample size, sampling interval, and control limits width. Optimally selecting these parameters depends on several process parameters, which have been considered from statistical and...
متن کاملT Control Chart with Double Warning Lines
Recent studies have shown that the 2 T control chart with variable sampling intervals (VSI) and/or variable sample sizes (VSS) detects process shifts faster than the traditional 2 T chart. This article extends these studies for processes that are monitored with VSI and VSS using double warning lines ( DWL T − 2 ). It is assumed that the length of time the process remains in control has exponent...
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ژورنال
عنوان ژورنال: ANNALS OF THE ORADEA UNIVERSITY. Fascicle of Management and Technological Engineering.
سال: 2014
ISSN: 1583-0691
DOI: 10.15660/auofmte.2014-1.3008