The Evolution of Useful Things A Book by Henry Petroski Here, then, is the central idea: the form of made things is always subject to change in response to their real or perceived shortcomings, their failures to function properly. This principle governs all invention, innovation, ingenuity. Spike and sponShaped and reshapedForm follows failureTheir wrongness is somehow more immediateA small corner of the world of things+23 More The evolution of devices formfunctioninventionprogressfailure
251. Different Chairs Problem People are different sizes; they sit in different ways. And yet there is a tendency in modern times to make all chairs alike. Solution Never furnish any place with chairs that are identically the same. Choose a variety of different chairs, some big, some small, some softer than others, some rockers, some very old, some new, with arms, without arms, some wicker, some wood, some cloth. Christopher Alexander, Murray Silverstein & Sara Ishikawa, A Pattern Language Drawing pictures of citiesAn index of the shifting patterns furniture