Full Changelog

25.0 released May 20, 2025

  • Split-split-plot Analysis - Import and analyze designs with multiple levels of hard-to-change factors. Stat-Ease 360 only.

  • Split-split-plot Multilevel Categoric - Build a Multilevel Categoric design with hard-to-change and very-hard-to-change factors. Stat-Ease 360 only.

  • Perceptually Uniform Color Maps - New color gradient selection that removes false anomalies and improves areas of low contrast.

  • Diagnostics for Gaussian Process Models - Added diagnostics for Gaussian Process models. Stat-Ease 360 only.

  • Flags can now be moved to any place in the design space.

  • Blocks, Groups and Subgroups can now be renamed.

  • Optimization criteria will now have their individual desirability displayed.

  • Optimization Ramps, Bars, and Solutions report can be viewed at any arbitrary place in the design space.

  • Increased the size of the legend and graphs to better fill the size of the window.

23.1 released December 16, 2023

  • Durbin-Watson Statistic - Added the Durbin-Watson statistic to the diagnostics. This is a measure of auto-correlation in the residuals.

  • Fixed unhandled exception when editing the constraints.

  • Removed bold lines that appear when transposing tables in the Point Prediction report.

  • Fixed a crash in Numerical Optimization when a categorical factor is present.

  • Fixed a crash when using the Excel import feature with a file that is not an Excel file.

  • Adding a new graph via the + button in Custom Graphs now works consistently.

  • Fixed a crash in the analysis of Equation-Only responses.

  • Rebuilding a design with discrete factors no longer warns about unique numeric values.

  • The Ramps view in Numerical Optimization now shows the solution correctly when the Logit transform is applied.

23.0 released October 15, 2023

  • Gaussian Process Models for Noisy Responses - Gaussian Process models are now available for responses with noise. Stat-Ease 360 only.

  • Lifetime Analysis with Weibull (Python) - A Python script that can perform lifetime analysis with a Weibull fit is available in the Script dialog. Stat-Ease 360 only.

  • Transpose Tables - Most tables in the software can now be transposed by right-clicking on the top-left header cell.

  • Analysis Summary - Added Lack of Fit and Curvature p-values to the Analysis Summary table.

  • Excel Import/Export - You can now import from, and export to, Excel files in Design-Expert. Previously was Stat-Ease 360 only.