How to write a technical brief that gets accurate quotes

Describe the job, not the technology

Start with what a person does today, step by step, and what should happen instead. "Sales team re-types orders from email into the ERP" is a brief. "We need an API-first microservice architecture" is a decision that belongs later, with the people who will maintain it.

Include volume: how many orders, users, records, and requests per day. Volume is what turns a feature list into an engineering estimate.

The eight sections worth writing

Problem and current process. Users and roles. Core flows, numbered. Data you already have and where it lives. Integrations with named systems. Constraints such as deadlines, compliance or budget bands. Success measures. Out of scope for this phase.

Out of scope is the section clients skip and later regret. It is the cheapest place to prevent scope arguments.

What to attach

Screenshots of the current tool, sample spreadsheets, screenshots of two products you like, and any brand assets. If a spreadsheet drives your operation, send the actual spreadsheet with the sensitive columns removed. It explains more than a page of prose.