Management Bug
An estimate means to guess or calculate the cost, size, value, etc., of something. (1) Unreliability relates to not being trusted or believed. (2) Hence, unreliable estimates are estimates that aren’t trustable or believable.
Unreliable estimates, whether for cost, scope or time, are among the largest reasons why projects don’t deliver their objectives. We’ve all heard of projects that end up going way over their original estimates…