On Prototypes

"The management question, therefore, is not whether to build a pilot system and throw it away. You will do that. The only question is whether to plan in advance to build a throwaway, or to promise to deliver the throwaway to customers. Seen this way, the answer is much clearer. Delivering that throwaway to customers buys time, but it does so only at the cost of agony for the user, distraction for the builders while they do the redesign, and a bad reputation for the product that the best redesign will find hard to live down.

Hence plan to throw one away; you will, anyhow."

Plan to Throw One Away The Mythical Man-month, Frederick Brooks, 1975, Addison Wesley, page 116