Consider a workstation with five machines. The arrival rate of jobs is 13.5 jobs per hour (with c 2 a = 1). Each machine takes 0.3 hour per job with a natural CV of 1 2 (that is, c 2 0 = 0.25). The mean time to failure for any machine is 36 hours, and repair times are exponential with a mean time to repair of 4 hours.

(a) Show that the SCV of effective process times is 2.65.

(b) What is the utilization of a single machine when it is allocated one-fifth of the demand (that is, 2.7 jobs per hour) assuming ca is still equal to 1?

(c) What is the utilization of the station with an arrival rate of 13.5 jobs per hour?

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Suppose that kenji, an economist from an am talk radio program, and lucia, an economist from a school of industrial relations, are arguing over health insurance. the following dialogue shows an excerpt from their debate: lucia: a popular topic for debate among politicians as well as economists is the idea of providing government assistance for health benefits. kenji: i think it is oppressive for the government to tax people who take care of themselves in order to pay for health insurance for those who are obese. lucia: i disagree. i think government funding of health insurance is useful to ensure basic fairness. the disagreement between these economists is most likely due to . despite their differences, with which proposition are two economists chosen at random most likely to agree? lawyers make up an excessive percentage of elected officials. minimum wage laws do more to harm low-skilled workers than them. tariffs and import quotas generally reduce economic welfare.

Suppose an economy consists of three sectors: energy (e), manufacturing (m), and agriculture (a). sector e sells 70% of its output to m and 30% to a. sector m sells 30% of its output to e, 50% to a, and retains the rest. sector a sells 15% of its output to e, 30% to m, and retains the rest.