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How to write software project requirements
Use this project requirements checklist to turn a business problem into a brief that can be reviewed and tested. It is written for business owners and operational teams preparing a website, internal application, portal or automation—not for choosing a technology before the work is understood.
1. Define the outcome before listing features
Write one sentence describing who needs to do what and why the current process prevents it. For example: “Operations coordinators need to see which requests require review without reconciling three separate inboxes.” This is an illustrative problem, not a client result.
Record the current baseline if you have evidence: how many requests arrive, where they are stored, and how long a defined step takes. If you do not have a baseline, write “not measured” and identify who can collect it. Do not promise a percentage improvement without a comparison method.
2. Map users, records and ownership
List each user role and the records it needs to read, create, change, approve or export. Separate internal notes from information a customer may see. Name the business owner who can resolve conflicting requirements.
Identify the system of record for each object: a customer, request, document or payment reference. Record the fields required to identify it and how duplicate records are recognized. Use synthetic examples in the brief rather than copying sensitive customer data.
3. Describe the normal workflow
Write the starting event, required inputs, decision rules, responsible person and completion condition. Use observable states such as Submitted, Needs Information, Under Review and Approved. Avoid “processed” unless everyone agrees exactly what it means.
For each handoff, specify what the next person receives and where the work waits. A receipt notification means information arrived; it does not necessarily mean a request was accepted, approved or scheduled.
4. Write exceptions as requirements
Include missing information, duplicate submission, unavailable reviewer, withdrawn request and failed connection. Decide who sees each failure and what they can safely do next. Do not assume a failed notification means the underlying record was not saved.
Ask what must happen when the same action is attempted twice. For an approval, the second attempt should not create a second approved record. For an update after approval, specify whether the approved version remains locked or a new review is required.
5. Define constraints and dependencies
Record existing systems, account ownership, available interfaces, data-export needs and any approved access restrictions. Separate verified constraints from assumptions that still need investigation. Name the person responsible for each unresolved dependency.
Describe performance in a testable context: the task, representative data size, expected usage and acceptable response. “Fast,” “secure” and “easy to use” are goals, not complete acceptance criteria. Agree the concrete checks and responsible reviewers appropriate to the project.
6. Turn requirements into acceptance checks
Use this pattern: Given [starting condition], when [authorized action occurs], then [observable result], and [prohibited result does not occur]. Include a normal case, an exception and an access boundary for each important workflow.
Example: Given a submitted request with a missing required location, when the coordinator reviews it, then the record moves to Needs Information with a recorded reason, and it cannot be marked Approved. A second test should show that a requester cannot change the reviewer’s decision.
7. Separate must-haves from later work
Mark each requirement Must, Should or Later, with an owner and a reason. A Must is necessary for the agreed first release to work; a Later item is explicitly outside that release, not silently forgotten.
Review changes against the brief. Record the requested change, effect on scope and dependencies, decision-maker and outcome. Keep unresolved choices visible instead of turning assumptions into implementation instructions.
Final project requirements checklist
Before requesting an estimate, check: one stated business outcome; identified users and owner; defined records and source systems; normal workflow; exception paths; access boundaries; constraints; acceptance cases; priority and exclusions; open questions with owners.
The output is a reviewable brief, not a fixed specification by itself. Have the affected users and decision-maker confirm it, then use discovery to investigate the remaining unknowns.
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