The lack of a precise definition for the Macintosh project was not a problem. Many of the designers preferred to define the computer as they went along. “Steve allowed us to crystallize the problem and the solution simultaneously,” recalled Mr. Smith. The method put strain on the design team, since they were continually evaluating design alternatives. “We were swamped in detail,” Mr. Smith said. But this way of working also led to a better product, the designers said, because they had the freedom to seize opportunities during the design stage to enhance the product.
co-evolution of problem and solution.