“Build an app” describes a format, not the problem it needs to solve. A useful software scope explains the outcome, the people involved and the boundaries of the first release.
Describe the work in context
Start with the users and the task they need to complete. What do they do today? Where do delays, duplicate entry or unclear handoffs occur? What information is required to make a decision? A few real workflows give a project team better direction than a long list of isolated features.
Record existing systems, constraints and dependencies early. These might include identity, payments, reporting, data migration, device access and third-party approvals. If a dependency is uncertain, state the assumption and assign someone to verify it.
Separate the first release from future ideas
Identify the smallest coherent set of workflows that can deliver a usable outcome. Describe what is included, what is outside the current scope and what could follow later. This makes estimates and trade-offs easier to discuss without pretending every idea has the same urgency.
Agree on acceptance criteria that a non-technical stakeholder can review. For example: which user can perform which action, what happens when required information is missing and how a completed task is confirmed. Include accessibility, security, performance and support expectations where they matter to the product.
Make decisions visible during delivery
Set review points for experience design and working releases. Keep a record of feedback, decisions and outstanding questions. If a new requirement changes the agreed work, document its effect on cost and timing and approve the revised scope before proceeding.
Scoping is a way to create shared understanding, not a promise that nothing will change. It gives the team a clear starting point and a sensible way to adapt as they learn.