 A single control chart for monitoring the frequency and magnitude of an eventZhang Wu, Jianxin Jiao and Zhen He International Journal of Production Economics, 2009, vol. 119, issue 1, 24-33 Abstract: While many control charts have been developed for monitoring the time interval (T) between the occurrences of an event; many other charts are employed to examine the magnitude (X) of the event. This article presents a single statistical process control (SPC) chart (called the rate chart) for simultaneously monitoring the time interval T and magnitude X based on the ratio between X and T. The new chart is more effective than an individual T chart, individual X chart, or a combined T&X chart for detecting the out-of-control status of the event, especially for detecting downward shifts (sparse occurrence and/or small magnitude). More profound is that, comparing with an individual T or X chart, the rate chart performs more uniformly for detecting both T shift and X shift, as well as the joint shift in T and X. The rate chart has demonstrated its potential not only for manufacturing systems, but also for non-manufacturing sectors such as supply chains, office administration and health care industry. Keywords: Quality; control; Statistical; process; control; Control; chart; Time; between; events; Magnitude; of; event (search for similar items in EconPapers) Downloads: (external link) Related works: Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text Persistent link: https://EconPapers.repec.org/RePEc:eee:proeco:v:119:y:2009:i:1:p:24-33 Access Statistics for this article International Journal of Production Economics is currently edited by Stefan Minner More articles in International Journal of Production Economics from Elsevier |
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