The video below demonstrates how to use a custom factor for a condition and correlate the levels of both a liquid and a diluent to that condition. In the example, pH is set as a custom factor; then, each pH level is used to correlate to a Liquid and Buffer of the corresponding pH.

The video below demonstrates how to create a mutually exclusive factor where "none" is one of the levels. In the example, the goal is to test the effect of different types of buffers, including adding no buffer at all. A custom factor called "Buffer Level" adds three levels, one of which will be "none." The other two levels correlate to the two types of buffers tested. See the next video to learn how to create a label column.

The video below demonstrates how to add a dummy custom factor to create a column in the DOE design output that can be used as a category label. Leveraging the example above, a second derived custom factor is added to create category labels for "None," "Buffer A," and "Buffer B" to make analysis easier later on.