O Scrum questiona por que tanto tempo e esforço são gastos na realização de uma tarefa, e por que somos tão ruins em prever o tempo e o esforço que as atividades vão exigir.

The technologies we use to try to ‘get on top of everything’ always fail us, in the end, because they increase the size of the ‘everything’ of which we’re trying to get on top.

The most surprising part of the 1985 Jeffery-Lawrence study appeared at the very end, when they investigated the productivity of 24 projects for which no estimates were prepared at all. These projects far outperformed all the others