Quick volume estimates that survive a meeting

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Tolerance stacks: no part is ever exactly the size on the drawing and products work anyway — the quiet math of manufacturing The Tacoma Narrows collapse taught engineers more about resonance than any wind tunnel study before it Theorems are not manufactured on demand — Fermat's Last Theorem waited 350 years for tools nobody had invented yet Safety factors and rules of thumb encode a century of failure — the know-how inside engineering codes was bought with collapsed bridges Math needs no experiments because its objects are definitions — you cannot drop an ideal triangle but you can derive everything about it Optimization without constraints is a math exercise; optimization with budget and weight and deadline is engineering Engineering is science with a deadline — a bridge must stand whether or not the theory behind it is elegant How operations research models real world scheduling problems The rule of 72 for doubling your money Fermi estimation: how a rule of thumb gets you within an order of magnitude