How does Fixed Asset Budget Functions in Ax 2012 R3?

Hello Friends,

I tried all possible scenarios to check how Fixed Asset budget functions in Ax 2012 R3.

I want to have a budget check either of these 3 options; FA Journal, FA acquisition through Purchase Order, FA acquisition through Project Accounting.

If any one of you can guide me to how budget check works on one of these 3 process, It will be a great help.