A Derived Factor is one whose levels will be derived from those of another factor - either as a numerical formula, or categorical mapping. Therefore, to define a derived factor, the factor from which levels will be derived must have been defined previously.
In Synthace, derived numerical factors often relate to the Mixture Compositions, Diluent To Use and Final Target Volume parameters in both the Make Mixtures and Mix Onto elements often used in conjunction with Custom Factors.
In this tutorial you will learn:
How to define a numerical factor
How to define a derived numerical factor
Define the factors that you will derive from
Build a workflow that defines a set of liquids and provides those liquids to a Make Mixtures element. In this example, Liquid A and Liquid B, both at 1 M concentration.
Switch the workflow builder into DOE Mode
Note: only the elements that can have DOE factors applied to their parameters will be interactive and display in colour. If the workflow has not already been added to a Synthace experiment you will be prompted to do so before being able to enter DOE mode.
Select the Make Mixtures element and toggle on the Mixture Compositions parameter to identify that you intend to describe these mixtures with DOE factors. To add a derived factor, at least one Mixture Compositions factor must have been defined in the workflow.
Click the adjacent factor button in the Instance Panel to launch the DOE Factor Panel.
Click on the ADD button to define a New Factor.
Define a factor called Liquid A with levels 10 and 100mM.
Click on Add Factor to save the factor to the factor table.
Define the derived factor
In the DOE Factor Panel click on the ADD button to define a Derived Factor.
In the Factor Definition Panel, click on the Factor Name entry field and enter the name of the derived factor, here Liquid B.
Select the units for this factor.
Note: the units for your factor must match the units you set for your stock liquid component within your workflow.
Click on the Equation panel and enter the equation from which the levels of the new factor will be defined. Click on the factor button underneath this panel if you want to add this to the equation. In this example, Liquid B will be used at 2X the concentration of Liquid A.
Click on “Add Factor” to save the factor to your Factor Table where you will see a summary of the factors settings.
Well done on making it to the end of this tutorial.
To learn about the different types of calculations supported for derived numerical factors, click here.
To learn about categorical derived factors, click here.
To learn about other factor types, click here.