Q7503, Principles of Project Management, Fall 2002 7 Estimation Bottom-up More work to create but more accurate Often with Expert Judgment at the task level Top-down Used in the earliest phases Usually with/as Analogy or Expert Judgment Analogy Comparison with previous project: formal or informal Expert Judgment Via staff members who will do the work Most common technique along w/analogy Best if multiple 'experts' consulted
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