Scrum Guide

When you use the term sizing, it's a heavy focus on accuracy. And if I can get a team to be 80 to 90 percent accurate with a lower amount of precision, that is going to be much better for estimating and forecasting. Michael: This gives everyone more freedom in the way that they plan. If there's only one thing that Scrum got wrong, it's this whole time-based estimation, estimation and hours of spring planning.