Or "by doing as little as possible". It's easy for me to throw together a small house, shed or bridge, but chances are whatever I build -- if it doesn't immedi

Or "by doing as little as possible". It's easy for me to throw together a small house, shed or bridge, but chances are whatever I build -- if it doesn't immediately collapse -- is horribly overbuilt for its purpose, because I don't know how to calculate and analyze the various stresses and material capacities well enough to size everything to a proper margin. So when I build a bridge I use lumber that is bigger than I think I need and use more of it than I think I need until it feels quite solid, but if I were a proper engineer I could figure out the exact right amount to use.