How to Write a Software Outsourcing Brief: A 7-Step Requirements Checklist

The first obstacle most companies hit when requesting quotes is not price. It is being unable to state what they want. Send a line like "I want a member management mini program" and quotes come back anywhere from 20,000 to 200,000 RMB — after which the natural conclusion is that outsourcing vendors quote at random. What actually happened is that the reliability of a quote is a function of the information in the brief. The vaguer the description, the more the vendor must either quote on the most conservative assumption or underbid on the most optimistic one.

Across ten years of outsourced projects, Juhui Software has seen both smooth engagements and ones that reworked the same screens repeatedly. The biggest difference usually appears before work starts: whether the client produced a software outsourcing requirements document someone can actually read. The checklist below is written from the client's side. You do not need to write code, but you do need to state the thing clearly.

1. Write who uses it before what it does

In a software outsourcing requirements document, the section most often skipped is user roles. The same "order management" means different things: a store manager sees all orders and processes refunds, a clerk sees only the orders from their own shift, finance sees amounts but not customer phone numbers. Different roles mean a different permission model, different page structures and different APIs — easily a twofold difference in effort.

List one row per role with three items: who this person is, what they must accomplish when they log in, and what they must never see. The third is the one most often omitted, and it is exactly where permission design begins.

2. Describe core flows step by step

Flow diagrams are a high bar for a client, but step descriptions are easy. Take a booking feature:

• User opens the mini program and selects a service and a store
• System shows slots for the next seven days, booked slots greyed out
• User picks a slot, enters name and phone, submits
• System re-checks availability, locks the slot and creates the booking
• User receives an SMS or WeChat notice; free cancellation up to two hours before
• Store sees the booking list in the backend and can mark arrived or no-show

Six lines carry ten times the information of "add a booking feature": slot conflict checking, notification channel, cancellation policy, store-side operations. The vendor can now estimate accurately, and you can see whether it matches your business.

3. Split the feature list into must-have and later

Putting every idea into one list is a common starting point for budget overrun. Tag each item P0 (the business cannot run without it), P1 (nice to have, phase two) or P2 (considered but uncertain).

In practice, only thirty to forty percent of a full wish list is genuinely P0. Quote the P0 set alone and the number you get is the true cost of a minimum viable launch. Keep P1 and P2 for phase-two planning, and use them to see whether a vendor can prioritise or only piles on features.

4. Six non-functional requirements that must be stated

Beyond features, six categories determine architecture and cost and are almost never written down:

• Scale: expected registered users, daily actives, peak concurrency. This is the dividing line between a shared server and a distributed architecture.
• Endpoints: mini program only, or mini program plus app plus PC backend. Each additional endpoint adds work rather than duplicating it.
• Integrations: existing ERP, accounting software, enterprise WeChat, hardware. The quality of the counterparty's API documentation drives the effort here.
• Data migration: whether historical data in spreadsheets or a legacy system must be imported, and whether the fields map.
• Compliance: personal information collection requiring a privacy policy and consent flow, payment channel qualifications, sector-specific credentials in medical or education categories.
• Deployment: public cloud, private server, on-premises requirements or security grading obligations.

5. Bring references — screenshots beat adjectives

"I want a clean, premium interface" cannot be estimated. Give three to five references instead: screenshots of comparable products, apps you find well designed, and an example of what you definitely do not want. If you have a legacy system or an Excel worksheet running the process today, send it — its fields and flow are the best requirements document you own.

Projects with references typically see noticeably fewer UI rework rounds, because "good looking" has been translated into something comparable.

6. Formality matters less than versioning

You do not need a forty-page PRD. A clearly structured document plus a feature table is enough to support a quote. Three things matter: a version number, an update date, and a change log. Then when you say "this was already discussed," there is a record.

Send the same software outsourcing requirements document to three to five vendors and the quotes become comparable — on the condition they all received the same thing. If one quote is dramatically lower, check first whether it quietly omitted a section you wrote.

7. One step you must not skip after requirements are agreed

Vendors usually hand over a requirements confirmation or feature list for signature. Do not skip it, and do not sign carelessly. Read line by line: is anything you raised missing, has any module been downgraded to optional or undecided, has a complex feature been reduced to a single sentence? This document becomes the contract annex and the basis for acceptance. Two hours spent before signing can save two months of dispute afterwards.

The value of writing requirements clearly is not that the vendor earns less. It is that both sides imagine the same thing. Most outsourcing disputes trace back to a few sentences that were never completed before work began.