If you are doing materials planning in AX there is a lot of information for you to work with and lots of parameters options for controlling the information you have available. Gross requirements are usually defined as sum of demand before netting off any inventory or expected receipts. Net requirement are then the result of subtracting from gross requirements the inventory, receipts, safety stock to determine what you will need to plan.

This is a quick walk through of the two screens in AX that you will see in various places for seeing the gross and the net requirements.

Cheers

Lachlan