Testing a prototype / developed design is a very important part of the design and manufacturing process. Testing and evaluation, simply confirms that the product will work as it is supposed to, or if it needs refinement. In general, testing a prototype allows the designer and client to assess the viability of a design.

Why is it important to test and refine a prototype?

Prototyping will help you understand the user experience better and expose any flaws or fixes you need to make before you reach the next step of your product design. ... With so many moving parts (pun intended), prototypes were needed for testing and refining.

Why is it important to test a prototype How many times should you test it?

Testing multiple designs allows you to gather more objective data, as you can get feedback for multiple designs. This is especially important when you want to demonstrate the case for a particular design, and perhaps try to convince a particularly reluctant stakeholder.