[9rx]

> Software development inherently involves more unknowns than fields like construction, making estimation harder.

If by construction you mean only cookie cutter houses and garden sheds, maybe, but construction doesn't end there. As soon as you look to anything interesting, construction has all the unknowns software has and an environment that brings even more unknowns. Computing environments, in contrast, are highly predictable. Software has it easy.

The trouble here is that the original premise is flawed. Construction estimation is almost never accurate. Open today's newspaper and you're almost certainly going to read about yet another construction project that is over time and over budget by millions upon millions of dollars.