In my country, a study was done to construct a new runway in the airport. The study specified certain thickness for the runway.<p>The construction contractors built it thinner, to save costs, and the result is that it cracked.<p>Because of this, this is how much money they ended spending:<p>- Initial runway (0.5x cost)<p>- Removing runway to make room for the new one (0.5x cost)<p>- Constructing new runway (1.0x cost)<p>We have a proverb there... &quot;the lazy works twice&quot;. This pretty much applies.