A article in the Journal of Quality in Clinical Practice

Chapter 15, Problem 122SE

(choose chapter or problem)

A article in the  Journal of Quality in Clinical Practice  [“The  Application of Statistical Process Control Charts to the Detection and Monitoring of Hospital-Acquired Infections,” (2001,  Vol. 21, pp. 112–117)] reported the use of  SPC methods to monitor hospital-acquired infections.  The authors applied Shewhart, CUSUM, and EWMA charts to the monitor ESBL Klebsiella pneumonia infections.  The monthly number of infections from June 1994 to  April 1998 are shown in the following table.

(a)  What distribution might be expected for these data?  What type of control chart might be appropriate?

(b)  Construct the chart you selected in part (a).

(c)  Construct a CUSUM chart for these data with  \(k=0.5 \text { and } h=4\).  The article included a similarly constructed CUSUM chart.  What is assumed for the distribution of the data in this chart? Can your CUSUM chart perform adequately?

(d)  Repeat part (c) for an EWMA chart with  \(\lambda=0.2\).

Equation Transcription:

Text Transcription:

k=0.5 and h=4

\lambda=0.2

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