In this Microsoft Project Tutorial, there are several good points on using PERT analysis for effort estimation.
Analogous and bottom up estimation techniques use different approaches when estimating effort and cost. One approach to estimation is to use a 3 point estimation technique. The PERT method provides a weighted average that is based on multiple points of estimation.
This video provides a good overview of PERT and how to use it in MS Project. Take a look at 4:30 timeline for the MS Project example.
Another useful approach to estimation using an Agile estimation technique is Planning Poker. You don’t necessarily need to be following Agile to apply the concepts of Planning Poker but it is a fun technique to arrive an agreed estimate. Take look at http://www.planningpoker.com/
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Hey this was nice informative video. I have found more such useful links at Microsoft project 2010 website. You can get access to project 2010 books, blogs, video and also register for upcoming online training session.
Check this
http://www.microsoft.com/project/en/us/train-learn.aspx