Ko Lefcho's step-by-step approach for haunting organizational problems: (1) identify everyone affected; (2) interview them one-on-one to understand the surface-level problems; (3) find the common theme behind them; (4) ask why past efforts failed; (5) form a vision of the world in which the problem is solved; (6) define the smallest policy iteration that restores a single person's faith in humanity; (7) ship small fixes repeatedly toward the vision. Used at his company to rewrite a billing system from scratch in six months, then rolled out to 70% of customers.