Design of a Mixture Experiment - Quick Tab

Select the Quick tab of the Design of a Mixture Experiment dialog to access the options described here.

Summary: Display design

Click the Summary: Display design button to display a spreadsheet that specifies the settings for each experimental run. The way in which the design is displayed is affected by the respective settings of the options on the Display design tab. To save the design, select the spreadsheet and use the Save or Save As options via the File menu. Note that to use this spreadsheet in further analyses, you must specify it as an input spreadsheet. For more information, see the Input Spreadsheet Overview.

Note: Partial replications. If you want to replicate selected points from the design (e.g., so that you can later obtain an estimate of pure error; see the Introductory Overview), first add rows to the design (use option Insert - Add Cases), and then copy and paste the respective runs into those new rows.

Change factor names, values, etc

Click the Change factor names, values, etc. button to display the Specifications for Mixture Variables spreadsheet with (1) the current factor (component) names, (2) minimum and maximum values, and (3) the sum total for the mixture. Enter the desired text and numeric values, and then click the OK button; the values that you enter are used in the spreadsheet displaying the design (option Summary: Display design, see above). See Summary for variables (factors) for more details. See also, General User Entry Spreadsheet.

Order of runs

The choice of options in the Order of runs group box affects the order of runs displayed in the spreadsheet. For standard experiments, it is common practice to randomize the runs in order to avoid any systematic biases due to fluctuations in the production process across runs.

Standard order

Select the Standard order option button to display the design in standard order.

Random

Select the Random option button to randomize the order of runs.