If you have ever asked three software companies for a quote and received three prices that differ by a factor of five, the problem was probably not the vendors. It was the brief. A short, well-structured requirements document lets each vendor price the same project, and lets you compare the answers fairly. You do not need a hundred pages. You need the right ten sections, written clearly. This guide shows what to include.
Start with the goal, the users and the scope
The business goal
Begin with why the project exists, not what it should do. Write two or three sentences on the problem, who feels it, and how you will know it is solved. For example: orders are taken by phone and written on paper, errors cost time, and the goal is to cut order errors and give owners a live view of sales. A vendor who understands the goal can suggest better solutions than the ones you wrote down.
The users and their tasks
List each type of user and what they need to accomplish: customer, cashier, warehouse operator, accountant, manager, administrator. Write tasks as short statements, such as "a courier marks a parcel as delivered and records the cash collected". This is easier for both sides than feature lists, because tasks reveal the screens and rules behind them.
What is in and out of scope
In scope. Group the work into modules or phases, and mark each as essential, important or nice to have. This helps vendors propose a first release that is useful and affordable.
Out of scope. Say what you are not asking for, such as a mobile app in the first phase or migration of ten years of history. Explicit exclusions prevent misunderstandings that surface months later as disputes.
List integrations, data and constraints
Integrations drive cost more than many screens do. Name every system the new software must connect to: payment gateways, accounting software, shipping companies, WhatsApp, the tax authority, existing databases. Describe what data moves, in which direction, and how often. Also describe any existing data that must be imported and what condition it is in.
Non-functional requirements
These are the qualities that make or break a system and are often forgotten:
- Languages and layout direction, for example Arabic and English with right-to-left support.
- Number of users and expected growth.
- Performance on mobile data or weak connections.
- Security needs, such as roles, audit logs and data protection.
- Availability expectations and acceptable downtime.
- Where the data must be hosted, if there is a constraint.
Budget, time and technology
Vendors often hesitate to ask about budget, and buyers often hesitate to share it. A budget range lets a vendor design the right solution instead of guessing. Include your target dates and the reasons behind them, such as a season or a regulation. Mention technology preferences or constraints only when they are real, such as an existing hosting environment or a team that will maintain the code.
Make proposals easy to compare
Examples and references
Screenshots of current tools, sample invoices, spreadsheets and photographs of paper forms communicate more than paragraphs of text. If there are products you like or dislike, include them with one line on why.
How you will decide
Tell vendors how proposals will be evaluated and what you expect to see: approach, timeline, team, price breakdown, support terms and similar past work. Ask for estimates split by phase, so you can compare line by line. Clear criteria produce better proposals.
Leave room for discovery and agree on ownership
Discovery
A requirements document is a starting point, not a contract. Some details only emerge during workshops with real users. Good vendors will propose a short discovery phase to confirm scope and refine estimates before a fixed price is set. Be wary of anyone who gives a precise price for a vague brief without asking a single question.
Ownership and support
- Who owns the source code and the data?
- What warranty or bug-fix period follows launch?
- How is ongoing support priced and measured?
- How do changes to scope get estimated and approved?
A one-page template to start with
If a full document feels heavy, begin with one page: goal, users and tasks, must-have features, integrations, constraints, and success measures. Send it to two or three vendors and ask their questions. The questions themselves tell you a great deal about how they work.
We are happy to help companies turn a rough idea into a clear brief during a short discovery conversation, whether or not they hire us afterwards. Look at our services and past projects, then contact Narmar to talk through your requirements.
