There is a great story on Quora related to this: https://www.quora.com/Why-are-software-development-task-estimations-regularly-off-by-a-factor-of-2-3/answer/Mi

There is a great story on Quora related to this: https://www.quora.com/Why-are-software-development-task-estimations-regularly-off-by-a-factor-of-2-3/answer/Michael-Wolfe https://www.quora.com/Why-are-software-development-task-esti...