|Design and Analysis
of Experiments (DOE)
Title: Using CUSUM Charts to Detect Small Process Shifts
Author: Keith M. Bower
Publication Source: International Society of Six Sigma Professionals, EXTRAOrdinary Sense, Vol. 2 No. 3, May 2001, pp. 1, 8
In this article, the author investigates the use of the Cumulative Sum (CUSUM) chart, which is a useful tool to detect small but persistent changes in a process. This paper makes use of a MINITAB macro which may be downloaded for free.
Though the CUSUM procedure is criticized by some authors as being difficult to understand, I fail to see why this is the case. When teaching, the golf scoring analogy seems to work very well.
The macro was written solely to remove some of the mathematical "legwork" though it's trivial from a mathematical perspective.
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