Ebtm 306 Hw 5 Ex 1-4

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1. Direct Cost = Hourly Rate $40/hr X Hours Needed 80 = $3200 2. A. Estimated total cost for the house is $348,000 (2,900 sq. ft. x $120 per foot). B. Estimated savings of Serge’s plumbing work and Mrs. Tolstoy’s interior decorating: Plumbing roughed in 6% x $348,000 = $20,880 Plumbing fixtures installed 4% x $348,000 = $13,920 Interior decorating 4% x $348,000 = $13,920 Total saving = $48,720 Estimated total cost for the completed house using their talents is $299,280 ($348,000 - $48,720). 3. A. Design? Cost =600,000*0.4=$240,000 B. Programming? Cost=600,000*0.2=$120,000 C. In-housing testing? Cost=600,000*0.4=240,000 What weakness are inherent in this estimating approach? WBS is a great way of dividing into phases and deliverables to find an estimate. The approach used here is a top-down estimate. Which is based on experience and can sometimes be estimated by someone with little experience or knowledge. Not all the information is there to make an accurate estimated. There are things like human nature, political dynamics that can cause error in the estimates. The percentages that are allocated may not be reasonable or accurate and may change. The estimates are sometimes based of resources and not the actual deliverable which could easily lead to error. 4. A. What is the estimated project duration? 1290 / 5 function points = 258 person months. 258 people / 6 available = 43 months. B. If 20 people are available for the project, what is the estimated project duration? 258 person months / 20 available = 12.9 months C. If the project must be completed in six months, how many people will be needed for the project? 258 person months / 43 months =6. So 43 people will be

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