Which of the following is a tool used to secure expert judgment?

My answer will be b) Expected value technique

Delphi Technique

expert systems is the best tool for expert judgment.

I think that; Create a WBS

The best tool used to secure expert judgment is "Expected Value technique".

a tool which is use to secure judgement by dealing him in love manner which gives the judgement to side of employee is main tool which works in all positions 

Delphi Technique, since it is based on consensus of decision making model

a) Peer Review

b) Expected value technique.