EWMA Chart in Excel

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EWMA Chart from QI Macros in Excel

Purpose: Evaluate stability of processes using variable data--time, cost, length, weight

The EWMA (exponentially weighted moving average) chart can help you evaluate a process when there is only one sample and you are interested in detecting small shifts in performance. The EWMA's performance is similar to the Cusum chart.

EWMA charts are just one of the tools included in the QI Macros for Excel SPC Software for Excel.

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The QI Macros for Excel $139, is an inexpensive easy to use set of Excel add-ins for statistical process control and Lean Six Sigma. It draws line, pie, bar, pareto, box whisker, histogram (Cp, Cpk), scatter and control charts (with stability analysis).

It contains over 70 fill in the blank templates such as the Ishikawa diagram, QFD, DOE, FMEA, PPAP, and Gage R&R for MSA. Performs ANOVA, t-test, F-test, and regression analysis.

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