Dumb scale-up is one-off, bespoke, and slow. It correlates with delays, cost overruns, and benefit shortfalls. Any business, government, or NGO that depends on dumb scale-up is unlikely to be successful. Smart scale-up is the answer. — Nuclear power is an obvious example of dumb scale-up, almost embarrassingly so. This is because both the technology and the economics of nuclear are so evidently flawed that the deficiencies are impossible to overlook.