The number of failures most often correspond to the number of successes.
It is all about being able to test ideas and concepts as early as possible in the process, keeping minimum cost. And the most important - before significant investment is made in the development.
Pretotyping allows to turn failure into a benefit, saves time and money, as well as helps to gather customer feedback more efficiently. Act low in risk, but high in value and take a step further to create your first pretotype!