Yash

“Trial-and-error experimentation can be informal or formal; the underlying principles are the same. As an example on the informal side, consider a user experiencing a need and then developing what eventually turns out to be a new product: the skateboard. In phase 1 of the cycle, the user combines need and solution information into a product idea: “I am bored with roller skating. How can I get down this hill in a more exciting way? Maybe it would be fun to put my skates’ wheels under a board and ride down on that.” In phase 2, the user builds a prototype by taking his skates apart and hammering the wheels onto the underside of a board. In phase 3, he runs the experiment by climbing onto the board and heading down the hill. In phase 4, he picks himself up from an inaugural crash and thinks about the error information he has gained: “It is harder to stay on this thing than I thought. What went wrong, and how can I improve things before my next run down the hill?”
― Eric von Hippel, Democratizing Innovation