How to Write a Software Project Brief That Gets Accurate Estimates
A guide to writing a software project brief for non-developers, with a ready template for more accurate time and cost estimates.
- software requirements
- project brief
- custom software
A message like “I want a site like Amazon, how much?” cannot be priced accurately. You do not need to be a developer to write a good brief. You only need to say, in your own words, who must do what and why. The clearer the brief, the closer the estimates are to reality.
What a good brief includes
Problem and goal
Describe how the work is done today, where it breaks, and what should improve. A measurable goal is best: “orders without phone calls” is clearer than “a better customer experience”.
Users
Who uses the system: customers, staff, managers? What must each of them be able to do?
Main scenarios
Write a few scenarios instead of a long feature list:
- A customer chooses a product, pays, and gets a confirmation message.
- A staff member sees a new order and updates its status.
- A manager gets a monthly sales report.
Priorities
Split features into essential for the first version and later. This directly affects the cost of building software.
Integrations and data
Name any payment gateway, messaging service, accounting tool, or other system you must connect. If you have data in spreadsheets or an old system, say roughly how much.
Constraints
Include the desired timing, budget range, interface languages, and any legal or security requirements. A budget range helps the developer propose a fitting solution.
A ready template
Copy this and fill it in:
- Our business: one or two sentences.
- Current problem: what is not working now?
- Goal: what should change once this is built?
- Users: who, and in which roles?
- Essential scenarios: three to five.
- For later versions: features that can wait.
- Integrations: which services are needed?
- Time and budget: your range.
- Similar products: what do you like about them?
A brief does not need to be perfect. It needs to be clear enough for a developer to ask the right questions.
After you write it
Send it to candidates and notice what they ask. The quality of those questions is a good sign of the right person to build your project. If your brief is ready, or you want help completing it, send it to me.