Refining Estimates May Be Necessary for a Number of Reasons

Multiple Choice

Refining estimates may be necessary for a number of reasons. For example, people working on prototype development needing time to interact with the design engineers after the design is completed is a good example of

A) hidden interaction costs.
B) things going wrong on a project.
C) normal conditions not applying.
D) changes in project scope.
E) the customer not being clear about their expectations.