Every video job is priced by scope, so scope has to be captured first
The estimate is the product before the film is
Two production houses quoting the same brief can be forty per cent apart, and neither is being dishonest. One assumed a single-day shoot with a lean crew and two edit rounds; the other read the same brief as two days, a location move and a set of social cutdowns. The difference is not price, it is scope, and the client cannot see it unless you show it.
Holding scope as structured fields — shoot days, crew grade, locations, talent, equipment tier, travel, post days, deliverable list, included rounds — makes the estimate reproducible. Any producer in the house builds it the same way, and when the client trims a day or adds three vertical edits, the revised number is derived rather than renegotiated from memory.
Version control on estimates is not bureaucracy
Almost every commercial dispute in production traces back to which version of the estimate was agreed. Keeping each version on the opportunity, with what changed and when it was sent, ends that argument in about ten seconds.