US Patent Number
6980875
Publication Date
12-27-2005
Abstract
A method is provided for detecting or predicting an undesired deviation in variability of at least one parameter being monitored, wherein the variation in the parameter is incrementally recorded. The method comprises establishing the number of subsets of a dataset that have a range of the difference between any two datapoints within the dataset, and computing a control chart for the range based thereon. The method accurately detects changes in variability in real time. The true distribution of the data is reflected, and the desired result is achieved without requiring an inordinate number of computations.
Assignees
University of Kentucky Research Foundation, Lexington, KY (US)
Application Number
10/818,385
Filing Date
04/05/2004
Recommended Citation
Stromberg, Arnold J., "Nonparametric Control Chart for the Range" (2005). Statistics Faculty Patents. 2.
https://uknowledge.uky.edu/statistics_patents/2
