Understanding Capacity Consumption key figure

Dear Experts,

Good day!

I would like to ask for your help on how this Capacity Consumption key figure is being calculated in Capacity Leveling planning book/data view. As I understand, there's an assigned key figure function on this SAP standard key figure which calculates and computes for the values. However, as functional IT, I have limited familiarity on understanding the function via source codes.

Also, if possible, can you please help me understand the relation of this Capacity Consumption key figure and the variable, fixed duration master data at PPM? Appreciate your soonest feedback here.

Regards,

AA