Andy is the project manager of the NHGQ project for his organization.

A three-point estimate requires that each activity be estimated for its optimistic, most likely, and pessimistic duration. Once the three estimates have been created, an average of the duration estimates is found and this is the recorded duration for the project work.

Answer option A is incorrect. This is not a complete explanation of a three-point estimate.

Answer option C is incorrect. This is a definition of PERT, a similar time estimating technique.

Answer option D is incorrect. This is definition of PERT, but this answer uses the term GERT so it is not a valid choice.