A late change in requirements is a competitive advantage A Quote by Mary Poppendieck The State of Agile Software in 2018YagniComplete and consistent requirementsWelcome changing requirements agilesoftwaredesign
The requirements of economy Economy is the mother of most inventions, not necessity, unless in the sense of poverty and hardship. A requirement for convenience is simply a diluted requirement for ease and economy. It seems to be invariably true that those characteristics which lead people to call a design functional are derived from the requirements of economy and not of use. David Pye, The Nature and Aesthetics of Design Form follows functionEconomy of material and labor function