Understand what a prototype validates, what it doesn't prove and which deliverables help reduce uncertainty before developing.
Index
A navigable prototype lets you experience a journey before building integration and persistence. It helps assess understanding, sequencing and priorities. It does not prove performance, security or actual functioning of an API. A clear contract distinguishes these two things.
Choose the question the prototype needs to answer
Can the user complete the task? Do you understand the next step? Find the information you need? These questions guide the screens. A prototype that tries to represent the entire product can consume effort without delving into the most uncertain part.
Include the least comfortable states
In addition to the ideal path, represent filling errors, missing data, waiting and lack of permission. Use content close to the operation and identify fictitious examples. Generic texts hide space and comprehension problems.
- Documented test flow and objectives.
- Screens in sizes relevant to the audience.
- Task script without inducing the response.
- Record of doubts and decisions after tests.
What to order as delivery
In addition to the visual file, ask for a map of the journey, identified rules, components and open questions. The developer needs to know what is approved behavior and what is just a hypothesis. Combine file access and organization for continuity.
When a technical test is required
If the main risk is in device reading, offline operation or external integration, clicking on screens does not resolve the issue. A technical test can be carried out in parallel with the experiment design. The budget must separate these objectives.
Turn learning into decision
When finished, choose between developing, simplifying or revising the proposal. Don't treat aesthetic approval as validation of demand. Quantum9 can design and test the priority journey before construction. To structure the first delivery, see Product Discovery and roadmap.