Design-Ease version 7
software for experiment design

June 25, 2007


If you downloaded your Design-Expert 7 purchase via ESD, please read these installation notes before installing it:


If you purchased the full version of Design-Ease (single user or network license) and haven't registered, you can do so on-line at


A description of what's new can be found in the help system. In the program, choose Help/Contents from the menu bar. Under the topic, "Welcome to Design-Ease 7," you will find a section titled, "What's new in version 7 (the highlights)." The help system has also changed from the standard Windows Help to HTML format.


Supported operating systems

Windows NT
Windows 98 2nd Edition
Widows ME
Windows 2000
Windows XP

System Requirements

Attribute Minimum Recommended
Display resolution 800x600 1024x768 or greater
Memory NT,(98SE,ME)/(2000,XP) 128/256 MB 256/512 MB or greater
Processor Pentium Pro Pentium IV
Operating system Windows 98 SE Windows XP

Math Kernel Library (MKL)

Version 7 of Design-Ease uses Intel's Math Kernel Library (MKL) to optimize the computational speed. It is distributed as part of the installation.

Installing DLLs

When you choose "Install Design-Ease 7" from the main menu, the setup program will warn you if you do not have the proper authority to install system files. You will need to log out of your current account and log in as an administrator then restart the installation. Windows 2000 and later will give you an opportunity to enter a suitable account and password if you don't have administrative rights

Help file on network

A recent security change in XP prevents it from opening HTML help files that reside on a LAN or the Internet. If the de7HelpFile.chm file doesn't work from your network drive see the Microsoft support document,

Follow the instruction for Method 2 and set the MaxAllowedZone value to 1 to permit LAN access.

New tool for identifying effects

If you are analyzing a 2-level factorial, you can now identify unselected effects (and their values) on the normal/half-normal plots by holding the the Ctrl key and right-clicking on the point on the graph.


June 28, 2006:




Here is a sampling of what can be found in the Help system. In the program, choose Help/Contents from the menu bar. Expand the topic node, "Welcome to Design-Ease 7," and you will find a sub-topic titled "Program Hints and Frequently Asked Questions."


I can't find a command that I expected to be here. Where should I look for it?


Try clicking the RIGHT mouse button. In conformance with Windows standards, the right mouse button is used extensively throughout the program for various options.



How can I import data from a spreadsheet?


Data can be imported and exported using the standard Windows cut and paste operations. Simply highlight the group of cells (or select all) and select copy (Ctrl-C). Go to the program you want to paste them into and select paste (Ctrl-V).

If you are trying to import a new design from a spreadsheet, first set up a similar dummy design in Design-Ease making sure the factor levels are correctly defined. Next duplicate (or delete) rows in the design layout to get the desired number of rows. Last, copy and paste the data from the other source into the design layout over the old dummy data.



Why do I get different results than the program gives me when I do the calculations myself?


Differences between program results and hand calculations are normally due to a loss of significant digits when transferring values from Design-Ease to the program or calculator used to make the calculations. These differences can be particularly pronounced when a transformation is being used. For example, for readability, coefficients for the model on the ANOVA sheet are, by default, only displayed with 2 decimal places. You can increase the number of decimal places displayed by choosing the "force precision X decimal places" option under Edit/Preferences/Math.

To make sure you are not using truncated values, use the standard Windows cut and paste operations to copy the values (e.g., from the ANOVA sheet) and paste them directly into the spreadsheet or calculator program you are using to perform the calculations.



How do I view a graph of actual vs. predicted values, or some other combination of variables, which is not already provided in the program?


This can be done by inserting one or two blank responses in the design layout and copying data from reports, like the Diagnostic section at the bottom of the ANOVA. Then choose Graph Columns using these new columns. The extra responses can be deleted when you are finished looking at or printing out the graph.



In many cases, it's cost-prohibitive for us to replicate the experiments to account for experimental variation. Is there a method using DE7 for us to utilize repetition (multiple samples) in each trial run?


When there are multiple samples for individual runs, it is important to distinguish between experimental error (variation in control factors) and sample error (variation in sample measurements). You need to replicate the whole experiment to measure experimental error.

To handle sample error, you can take multiple samples for a particular run and enter the mean and standard deviation of the measurements as two separate responses. This will provide you with a single value (the mean), and a measure of the sample error (the standard deviation). It does not, however, give you any more information about the experimental error than is already provided by the hidden replication of the design.



How can I change the coding of a factor, or several factors, when the coded values have gotten messed up? This can happen if you enter actual values while displaying coded factors or edit the highs and lows in the design layout rather than the factor info dialog.


Follow these steps:

  1. Display the data in the design layout in actual units.
  2. Click on a factor header to highlight the data in the column.
  3. Copy (Ctrl-C) to the clipboard.
  4. Right click on the column header and select "edit info..."
  5. Change the +1 / -1 levels to the actual factor levels. Watch out for CCD's so that you don't enter the alpha values here.
  6. Click OK and you will see the actual factor levels change to new incorrect values.
  7. Paste (Ctrl-V) the original values back into the column. You will get a warning message. Click OK!
  8. Repeat steps 2 to 7 for the remaining factors.

Unfortunately, this trick won't work with mixtures as you can't edit the pseudo ranges. You will need to rebuild the design.



In the design builder, parts of the display appear to be missing or overlapping.


The program was designed for a minimum resolution of 800x600 using small system fonts. If you are using 800x600 with large fonts, not all views in the design builder will appear as they should. You can make these screens usable by turning off the design descriptions that appear at the top of the screen. To do this, follow these steps:

  1. Get out of the design builder and go back to the main view.
  2. Select Preferences from the Edit menu.
  3. In the "Math Design" section, check the box that is labeled: "Do not display design descriptions."


For Technical Support or other information contact:





E-mail: *

Web site:

Other info: *

* replace _at_ with @ to use the e-mail address.

Design-Ease is a registered trademark of

Stat-Ease, Inc.
2021 East Hennepin Avenue
Suite 480
Minneapolis, MN 55413

Copyright 2006. All rights reserved.