bottom-up, top-down, planes, space shuttle, errors, and cost of fixes from Richard Feynman. #readingToday

Most airplanes are designed "from the bottom up," with parts that have already been extensively tested. The shuttle, however, was designed "from the top down"— to save time. But whenever a problem was discovered, a lot of redesigning was required in order to fix it.

What do you care what other people think, Richard Feynman