A practical requirements checklist for teams planning custom software, including users, workflows, data, integrations, security, acceptance criteria and ownership.
Begin with the decision the software must improve
A useful requirements document starts with a business decision or operational result, not a list of screens. Write down what happens today, who is involved, where work slows down and what a better outcome would look like. “Build a dashboard” is a feature request. “Let operations see late orders before customers call” is a problem a team can design around.
Name the baseline where possible: how many people perform the task, how often it happens, which tools they use and what an error costs. These facts help a development team judge whether the first release needs automation, reporting, approval controls or simply a clearer shared workflow.
List users by responsibility, not job title
Job titles rarely explain permissions. A sales manager may approve discounts, while another sales manager can only review them. Define each user group by the actions it can take, the records it can see and the decisions it owns.
For every role, document the first task after sign-in, the information needed to complete it and what should happen when the task cannot continue. This exposes permission rules and exception states before they become expensive changes in development.
Map one complete workflow, including exceptions
Choose the most valuable workflow and map it from trigger to completion. Include who starts it, required inputs, validation rules, approvals, notifications and the final record created. Then add common exceptions: missing information, duplicate records, rejected approvals, failed payments or an unavailable integration.
A first release becomes easier to estimate when one workflow is complete. Ten half-defined workflows create more risk than one coherent path that a real user can finish and evaluate.
Create a data and integration inventory
List the information the product must store, where it comes from, who can change it and how long it should be retained. Mark personal, financial or commercially sensitive data because it affects access control, logging, backups and deletion procedures.
For each integration, record the system owner, API documentation, authentication method, expected request volume and what the product should do when the service is unavailable. A connector is not complete merely because it works in a demonstration; it also needs retries, error visibility and a recovery path.
Turn quality expectations into acceptance criteria
Words such as fast, secure and easy to use cannot be tested on their own. Replace them with observable conditions. Define which devices and browsers matter, what an authorised and unauthorised user can do, which actions need an audit trail and what must remain available during weak connectivity.
For each important feature, write a short acceptance statement: given a starting condition, when a user takes an action, then the expected result occurs. This gives product owners, designers, developers and testers the same definition of done.
Separate launch scope from the product backlog
Label requirements as required for the first usable release, valuable after validation or intentionally postponed. A launch requirement should support the core workflow, reduce a serious risk or satisfy a genuine operational constraint. Everything else belongs in a prioritised backlog.
Also define what the first release will not do. Explicit exclusions prevent assumptions from becoming surprise commitments and make later estimates easier to compare.
Confirm ownership, delivery and support before signing
The agreement should state who owns the source code, repositories, cloud accounts, domains, design files, data and documentation. Confirm how access will be transferred, how scope changes are approved and which environments are included.
Finally, define the launch and support model: migration responsibilities, training, monitoring, defect handling, backups and the response expected for urgent incidents. A clear handover is part of the product, not an administrative task left until the final week.
[ Put the thinking to work ]
