What is the difference between a bottom-up and top-down cost estimation approach?

Question

Accepted Answer

Bottom-up estimates costs for individual tasks, while top-down estimates the overall project cost first.

Answer

Top-down estimates costs based on historical data, while bottom-up estimates based on expert judgment.

Answer

Both approaches produce the same results, just the estimation order differs.

Answer

Bottom-up estimates are more accurate, while top-down estimates are more efficient.

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