You can't run a credible business or even your own household without knowing your cost basis for its operations and the demand for future expenditures. In the presence of uncertainties in the business and for your house for that cost basis and the value produced by those expenditures (funds not budget), you're going to have to make estimates.
To say otherwise means you're operating in an Open Loop system.
Open Loop systems have a nasty tendency to crash and burn.
If you lack the academic foundation and validated experience, your advice on any matter is just an unsubstantiated opinion, with no basis in fact or principle.
— USAF Col, Program Manager, NNSA Nuclear Weapons Test Site
