The Corner Cleaners 24-hour laundromat has 16 washing machines. A machine breaks down every 20 days(exponentially distributed). The repair service the laundromat contracts takes an average of one day to repair amachine (exponentially distributed). A washing machineaverages $5 per hour in revenue. The laundromat is considering a new repair service that guarantees repairs in0.50 day, but they charge $10 more per hour than thecurrent repair service. Should the laundromat switch tothe new repair service?

Fee-for-service payments give each service a point value. True or False?

Agan Interior Design provides home and office decorating assistance to its customers. In normal operation, an average of 2.6 customers arrive each hour. One design consultant is available to answer customer questions and make product recommendations. The consultant averages 10 minutes with each customer. (a) Compute the operating characteristics of the customer waiting line, assuming Poisson arrivals and exponential service times. (Round your answers to four decimal places. Report time in hours.) ?=?=Lq=L=Wq= hW= hPw= (b) Service goals dictate that an arriving customer should not wait for service more than an average of 5 minutes. Is this goal being met? (Round your answer to one decimal place.) Wq (in minutes) =  min, which is     than the desired wait time, so the goal     met. What action do you recommend? (Select all that apply.) Increase the mean service rate.Decrease the mean service rate.There is no need to change the current operating parameters.Hire another…

A crew of mechanics at the Highway Department garage repair vehicles that break down at      an average of 15 vehicles per hour (approximately Poisson in nature). The mechanic crew can      service an average of 3 vehicles every 10 minutes with a repair time distribution that      approximates an exponential distribution. The crew cost is approximately $100 per hour. The      cost associated with lost productivity from the breakdown is estimated at $25 per vehicle per      hour (or any fraction thereof). Which is cheaper, the existing system with one service crew, or      a revised system with two service crews? The average waiting time for adding the second crew      is 0.02.

A milling department has 10 machines. Each operates an average of eight hours before requiringadjustment, which takes an average of two hours. While running, each machine can produce 40pieces an hour.a. With one adjuster, what is the net average hourly output per machine?b. If machine downtime cost is $80 per hour and adjuster cost is $30 per hour, how many adjusters would be optimal?

Failsafe Textiles employs three highly skilled maintenanceworkers who are responsible for repairing the numerous in-dustrial robots used in its manufacturing process. A workercan fix one robot every 8 hours on average, with an exponen-tial distribution. An average of one robot fails every 3 hours,according to a Poisson distribution. Each down robot coststhe company $100.00 per hour in lost production. A newmaintenance worker costs the company $80.00 per hour insalary, benefits, and equipment. Should the manager hireany new personnel? If so, how many people? What would yourecommend to the manager, based on your analysis?

A car mechanic, Carlos, can install new mufflers at an average rate of 3 every hour (following an exponential distribution). Customers needing this service arrive at the shop (following a Poisson distribution) on an average of 2 per hour. They are served on a first-in, first-out basis and come from the very large (almost infinite) population of possible buyers. Calculate the following operating characteristics of the service system: a. The probability there are no cars in the system. b. The average number of cars waiting in line. c. The average number of cars in the system. d. The average time a car spends waiting in line. e. The average time a car spends in the system.

Virginia's Ron McPherson Electronics Corporation retains a service crew to repair machine breakdowns that occur on an average of λ = 4 per 8-hour workday (approximately Poisson in nature). The crew can service an average of μ = 6 machines per workday, with a repair time distribution that resembles the negative exponential distribution. a) The utilization rate of this service system (round your response to two decimal places)