Many wise people have said that what you put your attention on is what you will create around you. This is true in project management. If you concentrate on meeting the plan and slipping when big problems arise, you will, at best, ship on time, and more likely, you will ship late. . . .
To change your results by changing the way you look at how your team uses time, you must put your attention on how to make tasks take the least time possible. Replace “sticking to the plan” with “looking for ways to decrease the time spent.”