Top-Down Time Estimation in Project Management.
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Top-Down Time Estimation in Project Management.
- 1. Top-Down (Macro) • Analogous estimating • Parametric estimating • Learning curves • Function point analysis
- 2. Top-Down (Macro) Analogous estimating Analogous estimating involves comparing a proposed project to a similar past project to estimate the duration or cost
- 6. Top-Down (Macro) Parametric estimating Parametric estimating involves calculating our estimates based on industry benchmarks.
- 7. Top-Down (Macro) Parametric estimating 2500 ft2 costs $100,000 or $40 per ft2
- 8. Top-Down (Macro) Parametric estimating Estimate for a 2000 ft2 House: $40.00 per ft2 X 2000 = $80,000
- 11. Top-Down (Macro) Learning Curves The more times a task has been performed, the less time will be required on each subsequent iteration.
- 12. Learning Curves TimetoComplete 0 25 50 75 100 Number of Units Produced 100 150 200 250 300 350 400 Top-Down (Macro)
- 13. Top-Down (Macro) Function Point Analysis A function point is the amount of functionality of an information system (as a product). Function points measure software size.
- 14. Function Point Analysis Data Functions Internal Logical Files External Interface Files Transactional Functions External Inputs External Outputs External Inquiries Top-Down (Macro)
- 15. Function Point Analysis Category Number Complexity Sub-Total EI 3 3 9 EO 4 7 28 EQ 2 4 8 ILF 5 7 35 TOTAL 80 If one function point is an equivalent of eight hours of work in C++ language, then our project will take (80*8)=640 hours Top-Down (Macro)
- 16. Time and Resource Estimation Top-Down (Macro) Activity A Activity B Activity C Activity D Activity E Activity F Bottom-up (Micro)