(From Ravindran et al. 1987) A company manufactures three products A, B, and C. Each unit of product A requires 1 hour of engineering service, 10 hours of direct labor, and 3 pounds of material. Producing one unit of product B requires 2 hours of engineering, 4 hours of direct labor, and 2 pounds of material. […]
An M/M/1 queuing system has an arrival rate of 10 customers per hour. The average service time is 9 minutes. a. What is the system utilization? b. What is the average queue length? c. What is the probability that there are more than 3 customers in the queue? d. What is the probability that a […]
Consider a G/G/3 queuing system. Interarrival times are on average 5 minutes with a standard deviation of 6 minutes. Service times are on average 12 minutes with a standard deviation of 15 minutes. Use Equation 3.70 and Little’s law to determine average waiting time in the queue and average number of customers in the system. […]
Consider the following demand schedule for umbrellas at a local store: a. Draw the demand curve for umbrellas. Be sure to label the axes. b. Suppose the price of umbrellas is $14. Indicate the area of market consumer surplus in your graph. Also indicate the area that represents the total amount that consumers spend on […]
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