Results 201 to 210 of about 31,697 (261)

A GENERAL CLASS OF CUSUM STATISTICS

Probability in the Engineering and Informational Sciences, 2015
Much of the work relating to control charts is on monitoring observations for changes in mean. Here, for the first time, we develop a class of cusum-type statistics to monitoranyaspect of a process (for example, mean, variance, skewness or kurtosis). This development is based on recently published papers by the authors.
Withers, Christopher S., Nadarajah, Saralees   +1 more
openaire   +1 more source

Counted Data CUSUM's

Technometrics, 1985
Cumulative Sum (CUSUM) control schemes are widely used in industry for process and measurement control. Most CUSUM applications have been for continuous variables. There have been fewer uses of CUSUM control schemes when the response is a count such as the number of defects per unit or the occurrence of an accident.
openaire   +1 more source

Learning curve of robot-assisted transabdominal preperitoneal (rTAPP) inguinal hernia repair: a cumulative sum (CUSUM) analysis

Surgical Endoscopy, 2021
O. Kudsi, N. Bou-Ayash, F. Gokcal, A. Crawford, Sebastian K. Chung, A. Chudner, D. Litwin   +6 more
semanticscholar   +1 more source

New adaptive CUSUM charts for process mean

Communications in statistics. Simulation and computation, 2018
In this article, we develop an unbiased estimator of the mean shift, and then use it to enhance the sensitivity of the existing adaptive CUSUM (ACUSUM) chart. Moreover, a new ACUSUM chart is proposed using the structure of the Crosier CUSUM chart and the
S. Abbasi, A. Haq
semanticscholar   +1 more source

Enhanced CUSUM and dual CUSUM mean charts

Communications in Statistics - Theory and Methods, 2022
Abdul Haq, Ehsana Anum Syed
openaire   +1 more source

Multivariate Max-CUSUM Chart

Quality Technology & Quantitative Management, 2005
AbstractA single multivariate control chart referred to as the Max-MCUSUM chart that is capable of simultaneously detecting shifts in both mean vector and covariance matrix of a multivariate process is proposed. This chart is based on standardizing the sample mean vectors and covariance matrices and finding the sampling distribution of the standardized
Smiley W. Cheng, Keoagile Thaga
openaire   +1 more source

Enhanced adaptive CUSUM charts for process mean

Journal of Statistical Computation and Simulation, 2019
A statistical quality control chart is an important tool of the statistical process control, which is widely used to control and monitor a production process.
S. Abbasi, A. Haq
semanticscholar   +1 more source

Parabolic cusum control charts

Communications in Statistics - Simulation and Computation, 1997
In this paper some modifications to the traditional “V-mask” CUSUM control chart, here denoted V-CUSUM, are discussed. In particular, substitution of the linear decision boundary of the V-CUSUM by a parabolic shaped decision boundary is studied. The performance, in terms of average run length, ARL, of the thus defined parabolic CUSUM control chart, P ...
openaire   +1 more source

Cusums to Measure Chronic Daily Headache

Headache: The Journal of Head and Face Pain, 2006
Objective.—To investigate whether cumulated summed differences (cusums) can be used as a method for detecting effective interventions in chronic daily headache (CDH). If so, then can such interventions be detected sooner than 28 days? Background.—CDH probably represents the greatest current challenge in the field of headache treatment.
Edda, Freidank-Mueschenborn, Anthony W, Fox   +1 more
openaire   +2 more sources

CUSUM Charts With Variable Sampling Intervals

Technometrics, 1990
A standard cumulative sum (CUSUM) chart for controlling the process mean takes samples from the process at fixed-length sampling intervals and uses a control statistic based on a cumulative sum of differences between the sample means and the target value.
Marion R. Reynolds, Raid W. Amin, Jesse C. Arnold   +2 more
openaire   +1 more source