>1. Requirements change frequently while the code is being developed. (If we had detailed specs, we'd be constantly re-writing them.) This, so much. People wou

>1. Requirements change frequently while the code is being developed. (If we had detailed specs, we'd be constantly re-writing them.) This, so much. People wouldn't change blueprint of a house being built 3 times in two months, but for software they act like it's not even a minor setback.