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Table 1 Control chart performance by methodology

From: Prospective monitoring of imaging guideline adherence by physicians in a surgical collaborative: comparison of statistical process control methods for detecting outlying performance

 

Average Run Length (Monthly Quarters)

P-chart

23.0

Weighted Binomial CUSUM

7.2

Bernoulli CUSUM

6.7

EWMA

5.5

  1. The out-of-control average run length derived from the Monte Carlo simulation of each control chart methodology. Lower out-of-control ARL is indicative of greater chart sensitivity and is a measure of good performance. Pairwise comparisons between each methodology are different with p < 0.001 except between the two CUSUM methodologies, which has p = 0.19.