Agile Estimation Basics

1. Traditional PM methods estimate by activities – Break the scope into activities, estimate the duration of activity, add them up.
2. Agile PM methods estimate by features – First estimate size of features, then estimate duration of features.
3. Estimation of size happens as early and as often as possible.
4. Estimation of duration happens as late and as often as possible.
5. Always be a whole-team activity.
6. Estimates of size: User story or ideal days.
7. Estimate of Duration = [sum of all user stories or all ideal days] / [velocity]