What is the purpose of Compensation derived factors other than to use in eligibility profiles?

Summary:

Derived factors are used in eligibility profiles. But, are there other ways where we can use them? There is a provision to add them as default values in the Compensation plans-->column properties (for worksheet and in Budget pages). If we add any derived factor to the default value section in any column, what will be the output?

Content (required):

There is a derived factor defined as Compensation<$80000 with determination date as as of event date. If I add this to Budget Distribution Amount (properties), what will be the output? Are there any rules for using Compensation derived factors in Compensation plan setup?