In: Statistics and Probability
1. YourHome Constuction has received favorable publicity from guest appearances on a public TV home improvement program. Public TV programming decisions seem to be unpredictable, so YourHome cannot estimate the probability of continued benefits from its relationship with the show. Demand for home improvements next year may be low, moderate or high. YourHome must decide now whether to hire more employees, do nothing or develop subcontracts with other home improvement contractors. YourHome has developed the following payoff table:
Potential Demand:
Decision alternatives Low Moderate High
Hire More employees -250,000 100,000 625,000
Subcontract 100,000 150,000 415,000
Do nothing 50,000 80,000 300,000
a. Which alternative is best according to the maximin (pessimistic) approach?
b. Which alternative is best according to the maximax(optimistic) approach?
c. Which alternative is best according to the equal likelihood approach?
d. Assume the following probabilities have been estimated.
Potential Demand
Low Moderate High .35 .55 .10
i. Calculate the EMV for each alternative.
ii. What would you recommend to YourHome if the EMV was used?
iii. Calculate the EVwithPI and the EVof PI for this problem.
iv. How would you interpret the EVof PI?
a)
Low | Moderate | High | Min | |
Hire | 250000 | 100000 | 625000 | 100000 |
Sub contract | 100000 | 150000 | 415000 | 100000 |
Do nothing | 50000 | 80000 | 300000 | 50000 |
100000 |
maxmin = 100000. So either Hire or Sun contract is best option
b)
Low | Moderate | High | Max | |
Hire | 250000 | 100000 | 625000 | 625000 |
Sub contract | 100000 | 150000 | 415000 | 415000 |
Do nothing | 50000 | 80000 | 300000 | 300000 |
MAXIMAX |
625000 |
Hire employee is the best option
c)
Low | Moderate | High | Average | |
Hire | 250000 | 100000 | 625000 | 325000 |
Sub contract | 100000 | 150000 | 415000 | 221666.7 |
Do nothing | 50000 | 80000 | 300000 | 143333.3 |
325000 |
Hire employee is best option
d)
i)
Low | Moderate | High | Expected payoff | |
0.35 | 0.55 | 0.1 | ||
Hire | 250000 | 100000 | 625000 | 205000 |
Sub contract | 100000 | 150000 | 415000 | 159000 |
Do nothing | 50000 | 80000 | 300000 | 91500 |
ii) Expected value for Hire is maximum. So it is recommended to hire more employees.
iii)
EM with PI is
EV|PI = 0.35*250,000+0.55*150,000+0.1*625000 = 232500
EVPI = EV|PI - EVM = 232500-205000 = 27500
iv)
Knowing the perfect information, extra gain will be 27500. So perfect information worth is 27500.