Prototypes are made by creating wireframes for each screen as determined by individual user flows, device and technical requirements, and an understanding of today’s design standards. Prototypes must be understandable to users, testable, and changeable.
A proof-of-concept prototype is designed to provide a demonstration of the core functionality of the product while showcasing the technical aspects of the product design.
Visually, this type of prototype is not intended to appear exactly as the final product will, and in many cases this type of prototype design will use “off-the-shelf“
Start with the essence.
Focus on what it does, not how it looks.
Follow interesting paths.
First, put the concept on paper. Get the idea out of your head and into the physical world…
Determine the appropriate prototype. How can you best convey your concept in physical form? If your product is large, or it’s not practical to manufacture for demonstration, consider building a scale model…
Even if the concept is complex, keep the prototype simple. With a physical prototype, less can be more…
Revisit and rework the prototype throughout the process. The first prototype will only rarely turn out exactly what you envisioned…
Trust a professional to help you source parts and construct the prototype…
I use Sketch, Invisionapp or Axure