Reduce avoidable work and repeated firefighting

A faster operation can still produce an unneeded result, repeat an error or leave the result waiting elsewhere. Use FPF C.42, Reduce Avoidable Work While Preserving the Needed Result, to construct a worthwhile change, compare its complete burden and make it usable in later work. Its elegance mantra connects these questions without imposing one work sequence. The engineering application explains how systems engineering, operations and method introduction contribute.