Question: 1. Describe the process of using the WBS to develop cost estimates. Discuss top-down versus bottom-up estimating. How are these estimates aggregated into total cost

1. Describe the process of using the WBS to develop cost estimates. Discuss "top-down" versus "bottom-up" estimating. How are these estimates aggregated into total cost estimates?

2. what is a control account, and what kinds of information does it contain? how does a control account fit into the structure of the PCAS?

3. how are the control accounts aggregated horizontally and vertically? why are they aggregated like this?

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