What defines acceptable range of variance for estimates in the cost management plan. 2. Which one describe the process to create the budget at completion. . WBS components .aggregation of activities .work package .rounding of estimates .task code identifiers 3. If project A has a NPV of 430000$ and the project B has an NOV of 350000$, what is the opportunity cost if the project B is selected. 4.PMI advise that one is not an entreprise environmental factor that can influence our cost management plan