Use Define Custom Mixture Design to create a design from data you already have in the worksheet. You can specify which columns contain your components and other design characteristics, such as process variables. You can also specify constraints for the components.
Mixture experiments include response variables that depend on the relative proportions of mixture components, such as the ingredients in bread dough. Minitab provides three design types, including simplex centroid, simplex lattice, and extreme vertices designs. You can also include process variables and total amounts of the mixture. For more information, go to What is a mixture design? and Choose a mixture design.
For example, an engineer has a mixture design in a Microsoft Excel spreadsheet and wants to use Minitab to analyze the data. The engineer opens the worksheet in Minitab, defines the design as a custom mixture design, and then is able to use Minitab to analyze the design.