Operating components develop/ submit budget request to agency. Actual programs and expenditures start to be planned.
Agency sends budget request to OMB. Agency decisions are documented and price tags attached.
The President's Budget request or Congressional submission is sent to Congress. The Executive Branch takes a stand, and asks for money
Congress finally makes up its mind, and passes bill. President vetoes or signs bill. Appropriations Act is now law. All negotiations are over at the Presidential level, but operating levels still have room to negotiate.