Start with the reason this software development companies in qatar should exist, not a feature list. What kind of user will use it day to day, with what frequency, and outsourcing versus in house software development what does the process look like without it? An experienced team who understands the goal often proposes a simpler way to reach it; a team that receives only a list of screens can only price the list as written.
Describe the scope as user stories or scenarios: who does what, and what happens next. Just as important, list what the first release deliberately excludes. An explicit exclusion list saves more disagreement during acceptance than the rest of the brief combined. Indicate as well which items are decided and which may still change — estimators price uncertainty, and concealing the open questions helps no one.
Set out your constraints. The list covers existing systems the software has to talk to, the data you have and where it lives, security and compliance rules, traffic expectations, target platforms and stacks you cannot change. If there is a hard date, explain what drives it: an experienced team will often rearrange the plan to hit it, provided they hear about it early.
Define what completion means feature by feature. Testable acceptance criteria do not need special syntax: a short paragraph describing what must be true when the feature works will do. That one addition reduces the sign-off process considerably and removes most late-stage disagreement.
One last thing, ask for a specific format. Ask for an itemised estimate, 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: hire mvp developers it normally identifies where your description is thin. At that point tighten that section and ask again — the second estimate tends to be the one worth planning around.