Start with the business problem, not a feature list. Which people will use this, how many times a day, and how is the job done today? An experienced team who grasps the purpose often proposes a cheaper route to it; someone handed only a feature list can only price exactly what is livewire you asked for.

Set out the scope as concrete flows: a walk through each important path. Equally important, write down what is out of scope. A written out-of-scope list saves more disagreement later than the rest of the brief combined. Indicate as well which parts are firm and which are still open — estimators price uncertainty, and concealing the open questions helps nobody.

List the constraints. This means the platforms and services involved, the data you have and where it lives, security and compliance rules, vue js vs reactjs user volumes, hire developers which devices matter and stacks you cannot change. If there is a hard date, explain what drives it: a team is usually able to rearrange the plan to protect it, provided they hear about it early.

Write down what completion means for each item. Clear acceptance criteria do not need formal language: a plain-language note describing the expected behaviour is sufficient. This one section compresses acceptance testing dramatically and eliminates the usual argument at handover.

One last thing, state what you want in the response. Require a breakdown by feature laravel or django module, the assumptions used, the main risks and a low number and a high number. Take a broad range as useful information rather than evasion: it usually points to where your description is thin. From there tighten that section and ask again — the revised figure is much more reliable.