Open with the business problem, not a feature list. What kind of user will use this, technical consulting services how many times a day, and how is the job done today? An experienced team who grasps the purpose will suggest an alternative that costs less; one who only sees the requirements as given can only price your assumptions along with the work.

Define what is included as user stories or scenarios: what the user does and what the system does in response. Just as important, write down what you are not building. An explicit list of exclusions saves more friction later than the rest vs graphql comparison of the brief combined. Indicate as well which decisions are settled and hire edtech developers which may still change — honest teams price those differently, and concealing the open questions helps no one.

Set out your constraints. These include systems you must integrate with, the data you already hold and its condition, compliance requirements, expected load, target platforms and any technology you are committed to. If there is a hard date, explain what drives it: laravel or ruby on rails a good team is usually able to cut the right scope to hit it, but only if they know it exists.

Say what done means feature by feature. Clear acceptance criteria do not require any formal notation: a plain-language note setting out what a user should be able to do is enough. This single habit reduces the review at the end dramatically and eliminates the usual argument at handover.

Finally, say what you expect back. Require an itemised estimate, the assumptions behind each number, the main risks and a low number and a high number. Take a broad range as useful information rather than evasion: it normally identifies the part of the brief that needs work. At that point tighten that section and ask for a new estimate — the next version will be much more reliable.