Estimating in Scrum : Breaking Away From Time Based Estimates.
This blog post explains why for Scrum it is better to drop the time based approach to estimating and specifically the focus on an individual.
estimating
Scrum-tastic Tuesday – Break it down
This blog post is about how to improve software project estimations by breaking tasks into sizes no larger than one productive day.
Estimating With Use Case Points
“Estimating With Use Case Points” describes the process to measure the size of an application modeled with UML, using use case points.