How to define MVP scope before building with AI

Define MVP scope by choosing one user, one important problem and one complete journey that produces a useful result. Include the access rules and checks needed to make that journey trustworthy. Put other ideas into an explicit later list.

An MVP does not need to contain every planned feature. It does need to be usable for the particular outcome you choose. A smaller scope can make the work easier to reason about, but it does not automatically make the product commercially successful.

Choose the first user and their job

Start with a specific user in a specific situation. “Small businesses” is a market description. “A workshop coordinator who assigns incoming repair jobs” gives you a workflow to design.

Ask:

• What starts their work?
• What result do they need?
• What prevents them from reaching it today?
• What could they reasonably do manually in the first version?

If you have several audiences, choose whose journey must work first. An internal coordinator, a customer and an external supplier can have different permissions and expectations. Supporting all three from the start is a deliberate scope choice, not a default requirement.

Map a complete first journey

Consider a fictional workshop scheduling app. Its first useful journey could be:

1. A coordinator creates a repair job.
2. They assign it to a technician and choose a time slot.
3. The technician sees assigned work and marks completion.
4. The coordinator can identify unfinished jobs.

A calendar alone would not complete that journey. A sophisticated analytics page would not replace it either.

Describe the minimum information each step needs. For this example, that might be a job reference, a short description, an assignee, a time slot and a status. Add fields because the workflow needs them, rather than because similar products have them.

If you are still deciding whether the project needs an app at all, read script, automation or app: where should you start?.

Separate essentials from useful additions

Use a scope table to explain what belongs in the first version and why:

“Later” means intentionally deferred. It should remain recorded so the builder understands the longer direction without being asked to implement it now.

Be careful with removing something that makes a core action safe. Access control for private records is not equivalent to a cosmetic enhancement. A payment confirmation check is part of a payment journey if paid access depends on it.

Clarify foundation decisions before tiny details

Some questions can change the whole approach:

• Will people work independently or share the same records?
• Does the process need to run without someone watching it?
• Will it handle sensitive information or irreversible actions?
• Does it depend on a third-party system you can actually access?
• Must it work offline, or is reliable connectivity available?

Other questions may reasonably wait: the exact wording of a button, a secondary filter, or how a report is arranged. Record them without making every small uncertainty a blocker.

For a tool that changes files or sends messages, agree on the first safe operating mode. A preview before changes or human approval before sending may be appropriate. The control should match the consequence of the action.

Define success as observable behaviour

“Works well” is difficult to check. Give the first journey concrete acceptance criteria:

• A coordinator can create a job with the required fields.
• A technician can see the job assigned to them.
• A technician cannot see another technician's restricted jobs.
• Completing the job changes its status and is visible to the coordinator.
• Invalid input produces a clear message and does not create a partial record.

These are example criteria for the fictional workshop. Your checks should follow your own access rules and workflow.

Also decide what evidence you want: a short demonstration, a test result, or both. A screenshot can show a screen exists; it cannot, by itself, prove the underlying permissions work.

Write the boundary in plain language

Use this sentence structure:

The first version helps [user] complete [journey] using [essential capabilities]. It includes [important safeguards]. It does not yet include [deferred areas]. We will check it by [observable result].

For the workshop:

The first version helps a coordinator assign repair jobs and see unfinished work. Technicians can view and complete their own assigned jobs. It includes access checks and required-field validation. It does not yet include billing, customer accounts or route optimisation. We will check the full create–assign–complete journey with separate coordinator and technician accounts.

This boundary gives both you and the implementing AI a way to recognise when a new request changes the scope.

Let the scope evolve deliberately

When a new idea appears, ask whether it is necessary for the chosen outcome, what it changes, and what it depends on. Update the plan before asking the builder to add it. Keep decisions and completed milestones visible so later work does not casually undo earlier choices.

Once the boundary is clear, use the technology choice guide and first-milestone testing checklist.

PenguinKit helps you discuss important choices and develop a project foundation you can review before implementation. You remain responsible for deciding whether the proposed scope serves your users.