Full Changelog

25.0.4 released October 8, 2025

  • The Import Data table now allows renaming of Blocks, Groups and Subgroups.

  • Fixed several issues with Numerical Optimization limits when using transforms.

  • Fixed a crash when augmenting a split-plot after deleting a Hard to Change factor.

  • Fixed an issue updating the axis data on the Predicted vs Actual graph.

  • Updates to Tutorials and Help documentation.

25.0.3 released August 5, 2025

  • Block, Group, and Subgroup names can now be edited while building a design.

  • Block, Group, and Subgroup names can now be edited in the Design Properties toolbox.

  • Increased the default number of runs for Latin Hypercube designs.

  • Enabled undo/redo for Group/Subgroup names.

  • Fixed a crash when viewing the Contour plot while using an inverse square root transform with negative predicted values.

  • Constraints will no longer use thousand separators for large coefficients.

25.0.2 released June 27, 2025

  • Fixed a labelling issue with half-normal plots in non-split-plot designs.

  • Added import_design command to the Python API to import designs from a list of lists.

  • Corrected overlapping labels on the Target criteria in optimization.

  • Reinstated factor/response names on labels in the Ramps view of Numerical Optimization.

  • The “Clear All” button in the Constraints dialog will now clear all constraints other than linear mixture high/lows.

25.0.1 released June 13, 2025

  • Fixed an issue with fonts not initializing to the proper point size.

  • Fixed a bug where contacting the license server could result in an “Access token is empty” error dialog.

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.