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ENGM 661. Risk Analysis with @ Risk. A 1 A 2 A 3. 3. ,. 000. p. . 1. /. 4. . . A i. . 4. ,. 000. p. . 1. /. 2. . 1 2 3. . 5. ,. 000. p. . 1. /. 4. . 10,000. Class Problem.
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ENGM 661 Risk Analysis with @ Risk
A1 A2 A3 3 , 000 p 1 / 4 Ai 4 , 000 p 1 / 2 1 2 3 5 , 000 p 1 / 4 10,000 Class Problem Suppose we have the following cash flow diagram (MARR = 15%). Determine if the project is worthwhile.
A1 A2 A3 3 , 000 p 1 / 4 Ai 4 , 000 p 1 / 2 1 2 3 5 , 000 p 1 / 4 10,000 Central Limit Theorem Preliminary
A1 A2 A3 3 , 000 p 1 / 4 Ai 4 , 000 p 1 / 2 1 2 3 5 , 000 p 1 / 4 10,000 Central Limit Theorem Distribution of NPW
A1 A2 A3 3 , 000 p 1 / 4 - = 867 E [ NPW ] Ai 4 , 000 p 1 / 2 1 2 3 5 , 000 p 1 / 4 10,000 Central Limit Theorem Distribution of NPW
A1 A2 A3 3 , 000 p 1 / 4 N(-867, 938) - = 867 E [ NPW ] Ai 4 , 000 p 1 / 2 1 2 3 5 , 000 p 1 / 4 10,000 -3,681 -867 1,947 Central Limit Theorem Distribution of NPW σ = 938
A1 A2 A3 N(-867, 938) 1 2 3 10,000 -3,681 -867 1,947 Central Limit Theorem Distribution of NPW P {NPW>0 = P {(NPW-u)/σ > (0- (-867))/938 = P{Z>.92} = 1- P{Z<.92} = .178
P{NPW >0} = .031 .063 .031 .016 .031 .016 .188
Analytic P{NPW > 0} = 0.188 C.L.T. P{NPW > 0} = 0.178
A1 A2 A3 3 , 000 p 1 / 4 Ai 4 , 000 p 1 / 2 1 2 3 5 , 000 p 1 / 4 10,000 Simulation
A1 A2 A3 3 , 000 p 1 / 4 Ai 4 , 000 p 1 / 2 1 2 3 5 , 000 p 1 / 4 10,000 Simulation
Simulation P{NPW > 0} = 5/20 = 0.25
Simulation Analytic P{NPW > 0} = 0.188 C.L.T. P{NPW > 0} = 0.178 Simulation P{NPW > 0} = 0.25
@Risk Analytic P{NPW > 0} = 0.188 C.L.T. P{NPW > 0} = 0.178 Simulation P{NPW > 0} = 0.25 @Risk P{NPW > 0} = 0.20 Next WEEK