Joel on Software posted an interesting aspect of usability (I found this thanks to Ann at World of Usability).
The more things have to be explained, either
- in training,
- in a manual,
- or on the screen,
the less usable an interface is.
The best point is his conclusion:
“Even smart, experienced, advanced users will appreciate things that you do to make it easy for the distracted, inexperienced, beginner users. Hotel bathtubs have big grab bars. They’re just there to help disabled people, but everybody uses them anyway to get out of the bathtub. They make life easier even for the physically fit.”