Budget is useful when you are running out of money and have to cut spending.
budgets help people reach their financial goals
Figures relating to a budget that are developed from the "bottom-up" following a participatory process are going to be the most useful.
The prediction is useful because it explains what observation will be made if a hypothesis is true
Apply it and monitor its purpose on a regular basis
It is best to make a budget that is a realistic target. It is also very useful to set aside a portion of income each month into a safe savings account that one can withdraw from, incase any unforeseen circumstances crop up.
The Production Budget for The Next Best Thing was $25,000,000.
The Production Budget for My Best Friend's Girl was $20,000,000.
The Production Budget for The Best Man Holiday was $17,000,000.
The Production Budget for The Best Years of Our Lives was $2,100,000.
The Production Budget for My Best Friend's Wedding was $46,000,000.
It really depends what your budget is....