How To Write A Project Brief That Earns A Reliable Estimate

Start with the reason this software should exist, not your preferred technology. Which people will use this, with what frequency, and what happens today? An experienced team who understands the goal will suggest an alternative that costs less; one who only sees a list of screens can only price exactly what you asked for.



Define what is included as short scenarios: who does what, and what happens next. Just as important, write down what is out of scope. An explicit exclusion list removes more disagreement later than any other single page. Indicate as well which parts are firm and which are still under discussion — the difference changes the price, and angularjs vs vue pretending everything is fixed helps no one.



Set out your constraints. The list covers the platforms and services involved, the data you have and where it lives, security and compliance rules, user volumes, which devices matter and infrastructure that is already decided. Where a date is genuinely fixed, say what depends on it: an experienced team is usually able to cut the right scope to meet it, but not if the date is a secret.



Say what done means for the important items. Clear acceptance criteria need not use formal language: a short paragraph describing what a user should be able to do will do. That one addition shortens the review at the end by a surprising margin and eliminates the most common source of disputes.



To close, state what you want in the response. Require a task-level breakdown, a written list of assumptions, whatever the team considers risky and a range rather than a single figure. Read a wide range as useful information rather than evasion: hire dedicated developers it normally identifies where your description is thin. From there clarify that area and ask again — the next version will be the one worth planning around.