---
title: "System Build: fixed-scope, fixed-price software development | Fluff Software"
description: "Custom web and mobile software built to a fixed scope and price, for grant-funded and procurement-led projects, delivered in tested releases."
url: https://www.fluff.software/ways-to-work/system-build/
updated: 2026-10-23
publisher: Fluff Software
---

# System Build.

Custom software built to a fixed scope and a fixed price, for projects that need an agreed budget before they start.

[Talk to us](https://www.fluff.software/contact/?interest=system-build)

_Image: A laptop showing code on a busy desk_

## When the budget has to be fixed up front.

Some projects need a defined scope and an agreed price before anything starts: a grant-funded build, a procurement process, a board that wants a single number.

For those, we build to a fixed scope. We agree what’s being built, how it will be tested and what it costs, then deliver it in releases you can see and test along the way. The [EAL grading engine](https://www.fluff.software/work/grading-engine/) is a good example: tightly defined, test-driven, and delivered on time and within budget.

If your scope is likely to change as you learn, the subscription is usually the better deal: no change orders, and the queue absorbs new ideas as they come.

## How a fixed-scope build runs.

1.

### Scope

Usually after a Discovery Sprint. What’s being built, for whom, and how we’ll know it works.

2.

### Fixed price

One number for the agreed scope, with acceptance criteria written in plain language.

3.

### Build in releases

Working software at each milestone, reviewed by a senior developer and tested by you.

4.

### Hand over or carry on

You own everything. Run it yourselves, or keep improving it on the subscription.

---

Fluff Software, a senior product team embedded in your business. Book a call: https://www.fluff.software/contact/ or email contact@fluff.software. Agents: see https://www.fluff.software/llms.txt and https://www.fluff.software/AGENTS.md.