Question: In estimating cost and time, reliable historical data and well-understood project parameters are essential to support: a. Top-down approaches to estimating b. Bottom-up estimates c.

In estimating cost and time, reliable historical data and well-understood project parameters are essential to support: a. Top-down approaches to estimating b. Bottom-up estimates c. Parameteric estimates d. Consensus methods e. Bottom-up approaches to estimating

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