Sunday, September 02, 2007

fan speed ordering

the fans ive observed in the US have the fan speeds ordering: (off, max, max-1, max-2,...)

--> this makes sense if there is a binary choice users want -- either you want the fan turned on at full-speed (e.g., in summer) or turned off. makes sense in that it minimizes the number of state changes between desired and undesired states.
but if for some reason, users wanted an intermediate speed, then it is suboptimal since it may require more state changes


the fans ive observed in India have the fan speeds ordering: (off, 1,2,..,max)
--> this makes sense if the user wanted to figure out what speed-level wants, and then wants the fan in that state for a long time. but i cant figure out why users in India would want this -- presumably they want a fan with just a binary choice (off or on-at-highestspeed) given that summers are more brutal in tropical climates.

1 comment:

Arvind Narayanan said...

gadgets in the US collectively seem to have been designed by autistic masochists.

not only do most user interfaces make no sense, every company believes in reinventing the microwave, toaster and every conceivable gadget.