Start with the problem you are solving, not a list of screens. What kind of user will use the system, with what frequency, and what happens today? An experienced team who grasps the purpose can propose a cheaper route to it; one who only sees a feature list prices the list as written.

Set out the scope as short scenarios: what the user does and what the system does in response. Equally important, list what the first release deliberately excludes. A written out-of-scope list removes more argument during acceptance than the rest vs graphql of the brief combined. Mark too which items are decided and which may still change — honest teams price those differently, and pretending everything is fixed only hurts you.

Set out your constraints. The list covers the platforms and services involved, the data you have and ecommerce software development company where it lives, regulatory obligations, traffic expectations, target platforms and infrastructure that is already decided. Where a date is genuinely fixed, node js vs laravel performance say what depends on it: a good team can often cut the right scope to protect it, but not if the date is a secret.

Define what done means feature by feature. Clear acceptance criteria need not use any formal notation: a plain-language note describing what must be true when the feature works is enough. This one section shortens the review at the end dramatically and eliminates the most common source of disputes.

Finally, state what you want in the response. Request a breakdown by feature or module, a written list of assumptions, whatever the team considers risky and an optimistic and a pessimistic figure. Take a broad range as a signal about the brief: it normally identifies exactly which requirement is unclear. Then rewrite that part and request a revised number — the revised figure will be the one worth planning around.