Function Point Modeler allows you to customize the Cost Factors . The attribute Used means whether it is used for the Cocomo calculation or not.
A Cost Factors can also consist of so called Sub Cost Factors . The sum of settings of Sub Cost Factors will be used for the parent Cost Factors .
It is recommended that first of all you collect the complexities of your customized Cost Factors before you use it in the Cocomo calculation.
In the following you see the Cost Factor setting dialog :
