The software estimation
Seems that father was better when it comes to management. He wanted everything on plan and to be right on the time that was needed. When he got a project he sets and plan and did some list and line up to be sure that everything that will be fine and better.
He uses the software estimation not just for estimating but to be sure that he got all the products on time and to be sure that the project would be finish right on the time that he was expecting. With the estimation you can be sure that all of the product that you needed should arrive on time with the high quality that you are expecting. Also there is the should cost modeling use for finding the right cost of the project. Just to be sure that he got the budget for the project enough with the time elapse and expected.