Screenshots of ControlFreak

ControlFreak is a Microsoft Excel template (running under Windows), which means that you can enter your data in the same way as you would do in any regular spreadsheet. The data can be entered manually or by querying a database. Here is how it may look:

Part of the Excel worksheet showing how the control chart data is entered

After you have entered the data into the spreadsheet you will open the Main Form to direct how the control charting should be done (Click on the image to enlarge it):

The Main Form where all control charting parameters are entered

Here are a few examples of ControlFreak's control charts:

A moving range control chart and below it a Shewhart control chart for individual data points — Moving range and Shewhart control charts

A 'J control chart' (also known as 'Zone control chart') — A J control chart (Zone control chart)

A basic Cusum control chart for location — A basic Cusum control chart

A combined Cusum control chart for location and scale, with an overlaid Shewhart control chart — A combined Cusum control chart for location and scale, with overlaid I chart

EWMA control charts for location and scale, with an overlaid Shewhart control chart — EWMA control charts for location and scale, with overlaid I chart

And here are a few examples of ControlFreak's data evaluation tools:

Histograms and normal probability plots to evaluate the normal distribution assumption — Histogram and Normal Probability Plots to evaluate data normality

Autocorrelation and 'lag 1' plots to evaluate data point independence — Autocorrelation and "Lag 1" plots to evaluate data point independence

And finally a couple of ControlFreak's Reports:

Report with process capability index estimates and confidence intervals — Capability Index Report

Report and plots of Box-Cox transformed data — Plots and Report of Box-Cox transformed data