Usability is good business

63% of software exceed their estimates, with the top four reasons all related to product usability:
– frequent requests for changes by users
– overlooked tasks
– users’ lack of understanding of their own requirements, and
– insufficient user-analyst communication and understanding.

Lederer and Prassad, in Bias, RG and Mayhew, DJ (eds), Cost-Justifying Usability, 1991.

Usability is good business