Describe the complete customer task
Consider a product that helps a small team manage service requests. The first useful workflow could be receiving a request, assigning an owner, recording progress and confirming completion. That description creates a testable boundary. A long list of dashboards, integrations and settings does not explain whether someone can finish the task.
Map the workflow with a potential user. Record where information enters, who acts next and what completion means. Include an incomplete request and a reassignment, not just the smooth path. Choose the actual workflow with the customer you intend to serve.
Separate essential behavior from later options
Write an acceptance example for each essential action. An owner can see assigned requests; a teammate can add a progress note; a manager can check which requests still need attention. Each example should describe visible behavior so the team can review a working version without interpreting a technical specification.
Keep optional features in a separate list with a reason to revisit them. Advanced reporting might wait until customers have enough records to learn from it. A manual import might be sufficient for a pilot if the customer understands the process. Agree on those tradeoffs explicitly and preserve the information needed to improve them later.
Plan accounts and team boundaries early
Decide whether people work individually or in shared teams, who can invite colleagues and how roles affect actions. A product used by multiple customer teams also needs clear ownership for each record. Test that a user cannot read or change another team's requests, even by changing a URL or submitting a different record identifier.
OWASP's authorization guidance recommends least privilege and permission checks on every request. Use those principles when designing invitations, removed users and administrative access. Interface visibility can help people understand their role, but hiding a button does not enforce the permission itself.
Define what subscription changes mean
Before connecting billing, describe the product behavior for a trial, active subscription, failed payment, cancellation and an ended subscription. Decide what access remains, how people recover from a failed payment and whether they can export their records. These are product decisions that affect trust as well as engineering.
Keep payment status and access rules understandable. A repeated billing event should not create duplicate entitlements or repeat a customer-facing action. Include a way to investigate a mismatch between the payment record and the account's access. Choose the implementation once the workflow and billing requirements are clear.
Use a pilot to choose the next feature
Set a pilot goal tied to the workflow, such as whether a customer can complete a service request without an extra spreadsheet. Record onboarding problems, abandoned steps and support questions. Review those observations with the customer before expanding the backlog.
Avoid promising a fixed delivery time from a feature count alone. Data migration, permissions, integrations and release requirements can change the scope. Bring the workflow and its acceptance examples to a planning conversation so a development team can explain the dependencies and propose a useful first release.