Constraint

Wired magazine (March 2009) illustrates Design under Constraint, with examples including cell phone antennae, plastic bottles, and electric cars.

"But for all that we can't do in this static medium, we find enlightenment and wonder in its possibilities. This is a belief most designers share. In fact, the worst thing a designer can hear is an offhand 'Just do whatever you want.' That's because designers understand the power of limits. Constraint offers an unparalleled opportunity for growth and innovation.
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Given fewer resources, you have to make better decisions."