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J Ambul Care Manage. 2002 Apr;25(2):78-88.

How do you know that your care is improving? Part II: Using control charts to learn from your data.

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1
R. G. Carey and Associates, Park Ridge, Illinois, USA.

Abstract

This article builds on my article in the January 2002 issue of JACM on the use of run charts to analyze data variation and document process improvement. It describes a more powerful tool than the run chart for analyzing variation and measuring process improvement, namely, the control chart developed by Walter Shewhart. This article first explains the basic elements of a control chart, the tests for detecting a special cause variation, and how to choose the best control chart for the type of data being collected. It concludes with one case study using a control chart to document a successful intervention and some suggestions regarding computer software.

[Indexed for MEDLINE]

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