Begin with the business problem, not a list of screens. What kind of user will use the system, how many times a day, and what does the process look like without it? An experienced team who grasps the purpose will suggest a cheaper route to it; a team that receives only a feature list will price the list as written.
Describe the scope as concrete flows: who does what, and what happens next. Just as important, state explicitly what the first release deliberately excludes. An explicit exclusion list prevents more friction at delivery time than any other single page. Indicate as well which parts are firm and which are still open — the difference changes the price, and pretending everything is fixed helps no one.
Set out your constraints. The list covers existing systems the docker software development company has to talk to, laravel vs nextjs the data you already hold and its condition, compliance requirements, user volumes, which devices matter and stacks you cannot change. If a deadline is real, say what depends on it: a team can often resequence the work to hit it, provided they hear about it early.
Define what completion means for the important items. Clear acceptance criteria do not require any formal notation: a short paragraph stating the expected behaviour is enough. That one addition compresses acceptance testing considerably and removes the usual argument at handover.
One last thing, say what you expect back. Require an itemised estimate, the assumptions behind each number, the risks the team sees and an optimistic and a pessimistic figure. Treat a wide range as information, not evasion: it usually points to where your description is thin. From there rewrite that part and python versus php request a revised number — the second estimate tends to be much more reliable.
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