Making a good Duration estimate

question:

It’s often advised that each project team member should estimate their own work. Do you think this is a good approach? What are some of the pros and cons? What ideas can you share for getting a good estimate?

please note: read the materia upload(PMBOK, pps. 141-152; 165-172 Schwalbe, Chapter 4; pps.137-141; 148-149 ) before write this paper.

and the paper witll send to turn it in system, so please write by own ideas. no copy