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Showing 1 to 12 of 12 for “"CUSUM Charts"”.
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Economically optimum design of cusum charts when there is a multiplicity of assignable causes
… is concerned with the design of cumulative sum charts based on a minimum cost criterion when there are multiple assignable causes occurring randomly, but with known effect. A cost model is developed that relates the design parameters (i.e. sampling interval, decision limit, reference value and …
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Analysis and Design of One- and Two-Sided Cusum Charts with Known and Estimated Parameters
… analyzing the performances of one- and two-sided CUSUM X charts with known and estimated in-control process parameters are studied. Some new integral equations for analyzing the two-sided CUSUM X are derived. These methods provide us with ways to approximate the run length distribution of the …
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Dynamic Probability Control Limits for Risk-Adjusted Bernoulli Cumulative Sum Charts
The risk-adjusted Bernoulli cumulative sum (CUSUM) chart developed by Steiner et al. (2000) is an increasingly popular tool for monitoring clinical and surgical performance. In practice, however, use of a fixed control limit for the chart leads to quite variable in-control average run length (ARL) …
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Variable sampling interval control charts
Process control charts are widely used to display sample data from a process for purposes of determining whether a process is in control, for bringing an out-of-control process into control, and for monitoring a process to make sure that it stays in control. The usual practice in maintaining a …
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Control chart procedures based on cumulative gauging scores
Control charts based on cumulative gauging scores rely on gauge scoring systems used for transforming actual observations into integer gauging scores. In some cases, the gauging scores are easy to obtain by using a mechanical device such as in the go-no-go inspection process. Thus, accurate …
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Production capacity utilization in the southern logging industry
… to analyze logging operations systems. Run charts, control charts, and cusum charts were used to measure variability in systems' production. Variation in production levels appear to be increasing with increased regulation. Elasticity has become essential for contractors to maintain …
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Surveillance of Negative Binomial and Bernoulli Processes
… p, be extremely small. Traditional Shewhart charts such as the p-chart, are not reliable for monitoring this type of process. A comprehensive literature review of control chart procedures for this type of process is given. The equivalence between two cumulative sum (CUSUM) charts, based on …
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On Development and Performance Evaluation of Some Biosurveillance Methods
This study examines three applications of control charts used for monitoring syndromic data with different characteristics. The first part develops a seasonal autoregressive integrated moving average (SARIMA) based surveillance chart, and compares it with the CDC Early Aberration Reporting System …
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GLR Control Charts for Monitoring Correlated Binary Processes
… a smaller END than the optimized Markov binary CUSUM. The second part of this research develops a CUSUM-pp chart and a GLR-pp chart to monitor p and p simultaneously. The CUSUM-pp with two tuning parameters is designed to detect shifts in p and p when the shifted values are known. We apply two …
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Evaluation of Scan Methods Used in the Monitoring of Public Health Surveillance Data
… These metrics, in conjunction with control charts such as exponentially weighted moving average (EWMA) charts and cumulative sum (CUSUM) charts, are examined. Two new time-to-signal measures, the average time-between-signal events and the average signal event length, are introduced to better …
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Cumulative Sum Control Charts for Censored Reliability Data
… propose likelihood ratio based cumulative sum (CUSUM) control charts for censored lifetime data with non-normal distributions. We illustrate the development and implementation of the charts, and we evaluate their properties through simulation studies. We address the problem of interval …