Remember serving God and playing God are two different things.
Serving God is about making a contribution; playing God is about trying to control the outcome.
Science and math can only take you so far. Life (people especially) is not made up of machines and predictable equations. There is no formula that can always guarantee you the outcome you desire. Getting things exactly right is never an exact science.
The ONE THING for today: serve God and those he brings into your life by doing your best but leave the results to God.
He has a lot more time, resources and abilities that you. Who knows, with the time, resources and abilities that God has, even your worse failure and worse day may turn out to be a win someday.