Paper by Jakob Nielsen and Jan Maurits Faber
Originally published in IEEE Computer Vol. 29 , No. 2 (February 1996), pp. 29-35.
Companies are shortening software project schedules to introduce products more rapidly than competitors. At the same time, customers are demanding higher usability. Unfortunately, the goals of increased usability and decreased development time conflict with traditional usability engineering approaches.
The design process always requires several rounds where interfaces confront users’ needs and capabilities and are modified accordingly. This approach is called iterative design. [Ref. 1] Our experience indicates the need for at least two iterations, yielding three versions, before the product is good enough for release. However, three...