Open with the business problem, not a list of screens. Which people will use the system, with what frequency, and what happens today? A vendor who understands the goal will suggest an alternative that costs less; one who only sees a feature list will price the list as written.
Set out the scope as concrete flows: what the user does and what the system does in response. Just as important, write down what the first release deliberately excludes. An explicit exclusion list prevents more argument during acceptance than any other single page. Also mark which decisions are settled and which may still change — honest teams price those differently, and hiding it helps nobody.
Write down the hard constraints. These include the platforms and services involved, the data you already hold and its condition, security and fintech development company compliance rules, expected load, which devices matter and any technology you are committed to. If there is a hard date, explain what drives it: ai automation company a good team is usually able to resequence the work to protect it, but not if the date is a secret.
Define what done means feature by feature. Clear acceptance criteria do not require any formal notation: a plain-language note describing the expected behaviour will do. That one addition reduces the review at the end considerably and eliminates the usual argument at handover.
Finally, say what you expect back. Request a breakdown by feature or module, affiliate software development company a written list of assumptions, whatever the team considers risky and a low number and a high number. Take a broad range as information, not evasion: it usually points to where your description is thin. At that point tighten that section and request a revised number — the revised figure is far closer to reality.