Consistency is touted as an important principle of UI
design. Arguments are made about focusing on user
needs, and avoiding stringent adherence to external
and internal consistencies. But, nonetheless, taking
advantage of user habits is a good thing for ease of
learning and intuitiveness etc.
What is the criteria for choosing an innovative design
over a conventional one? In addition, how does one go
about convincing non-designer, decision makers
(product managers etc) to take a chance with an
innovative design?