The Factor of Safety, or FoS if you’re feeling fancy, is a number that screams, “How much stronger is this thing than it needs to be?” If your part needs to hold 100 pounds, and it can hold 500 pounds, your FoS is 5. That’s like ordering a small coffee and getting a bath tub of espresso—delightfully overkill.
In engineering circles, they call it the “design margin,” but I call it the “how-much-will-this-embarrass-me-before-failing?” factor. Because let’s be real: no one wants to be the person who designed a bridge that only holds the weight of a single, very skinny bicycle.
