Hi ShaunR,
Thanks for your insight and comments.
I agree with you from the perspective view of the risk mitigation, we will give it a try in one of our future project.
Let me again come back to my initial question, How do we estimate a project size? we still need to estimate the size of a "project" or "features to be implemented in a next iteration" independent of the execution process.
I have read about Size Based Metrics, Effort-Based Estimations like Weighted Average, Planning Poker and Wideband Delphi methods....
Does any one able to apply any one of the above successfully in their projects? and how? or is there any custom approach
Thanks,
Vijay.