OPERATIONS MANAGEMENT
2nd Edition
ISBN: 9781260238877
Author: CACHON
Publisher: RENT MCG
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Chapter 2, Problem 12PA
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To determine: The number of skiers riding on the lift at any given time.
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One of the chair lifts at a ski resort unloads 1800 skiers per hour at the top of the slope.The ride from the bottom to the top takes 12 minutes. How many skiers are riding onthe lift at any given time?
The wheat harvesting season in the American Midwest is short, and farmers deliver their truckloads of wheat to
a giant central storage bin within a 2-week span. Because of this, wheat-filled trucks waiting to unload and
return to the fields have been known to back up for a block at the receiving bin. The central bin is owned cooperatively,
and it is to every farmer’s benefit to make the unloading/storage process as efficient as possible. The
cost of grain deterioration caused by unloading delays and the cost of truck rental and idle driver time are significant
concerns to the cooperative members. Although farmers have difficulty quantifying crop damage, it is
easy to assign a waiting and unloading cost for truck and driver of $18 per hour. During the 2-week harvest season,
the storage bin is open and operated 16 hours per day, 7 days per week, and can unload 35 trucks per hour
according to an exponential distribution. Full trucks arrive all day long (during the hours the bin is open)…
The wheat harvesting season in the American Midwest is short, and farmers deliver their truckloads of wheat to a giant central storage bin within a 2-week span. Because of this, wheat-filled trucks waiting to unload and return to the fields have been known to back up for a block at the receiving bin. The central bin is owned cooperatively, and it is to every farmer's benefit to make the unloading/storage process as efficient as possible. The cost of grain deterioration caused by unloading delays and the cost of truck rental and idle driver time are significant concerns to the cooperative members. Although farmers have difficulty quantifying crop damage, it is easy to assign a waiting and unloading cost for truck and driver of $17 per hour. During the 2-week harvest season, the storage bin is open and operated 16 hours per day, 7 days per week, and can unload 34 trucks per hour according to a negative exponential distribution. Full trucks arrive all day long (during the…
Chapter 2 Solutions
OPERATIONS MANAGEMENT
Ch. 2 - From the perspective of process analysis, which of...Ch. 2 - Prob. 2CQCh. 2 - Prob. 3CQCh. 2 - It is election day and 1800 voters vote in their...Ch. 2 - Prob. 5CQCh. 2 - Prob. 6CQCh. 2 - Prob. 7CQCh. 2 - Prob. 8CQCh. 2 - Prob. 9CQCh. 2 - Prob. 10CQ
Ch. 2 - Prob. 11CQCh. 2 - Prob. 1PACh. 2 - For the purpose of process analysis, which of the...Ch. 2 - Prob. 3PACh. 2 - Prob. 4PACh. 2 - Prob. 5PACh. 2 - Prob. 6PACh. 2 - TABLE 2.5 Time Stamps of 10 Customers Who Visited...Ch. 2 - Prob. 8PACh. 2 - Prob. 9PACh. 2 - Prob. 10PACh. 2 - Prob. 11PACh. 2 - Prob. 12PACh. 2 - Prob. 13PACh. 2 - Patients take a drug for severe acne for 6 months...Ch. 2 - Prob. 15PACh. 2 - A large-scale bakery is laying out a new...Ch. 2 - LaVilla is a village in the Italian Alps. Given...Ch. 2 - Prob. 18PACh. 2 - Prob. 19PACh. 2 - Prob. 20PACh. 2 - Prob. 21PA
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- A company that makes shopping carts for supermarkets and other stores recently purchased some new equipment that reduces the labour content of the jobs needed to produce the shopping carts. Prior to buying the new equipment, the company used five workers, who produced an average of 100 carts per hour. Workers receive $10 per hour, and machine cost was $40 per hour. With the new equipment, it was possible to transfer one of the workers to another department, and equipment cost increased by $10 per hour while output increased by 20 carts per hour. a. The labor productivity under the old system is Blank 1. Fill in the blank, read surrounding text. and the new system is Blank 2. Fill in the blank, read surrounding text. carts per worker per hour. b. Compute the total factor productivity under each of the systems. Old system Blank 3. Fill in the blank, read surrounding text.arrow_forwardHilltop Restaurant is located in Dempsey Hill. The restaurant has a capacity of 35 tables to serve customers. When doing its capacity planning and evaluating operational performance, the restaurant adopts the concept of “customer group” and uses it as unit of measurement to measure the workload in the service process. A customer group is a group of one or more people who arrive, get seated at a table, eat and depart. On average, a customer group takes 70 minutes to eat dinner, and then another 25 minutes to eat dessert. On average, a customer group generates a profit of $100 on dinner, and $30 on dessert. (a) Assume that all customer groups eat both dinner and dessert. Estimate the maximum number of customer groups per hour the restaurant can serve (capacity rate) by applying Little’s Law. At what rate (dollars per hour) is profit generated by the restaurant if it operates at capacity rate?arrow_forwardHilltop Restaurant is located in Dempsey Hill. The restaurant has a capacity of 35 tables to serve customers. When doing its capacity planning and evaluating operational performance, the restaurant adopts the concept of “customer group” and uses it as unit of measurement to measure the workload in the service process. A customer group is a group of one or more people who arrive, get seated at a table, eat and depart. On average, a customer group takes 70 minutes to eat dinner, and then another 25 minutes to eat dessert. On average, a customer group generates a profit of $100 on dinner, and $30 on dessert. Now assume that Hilltop leases new space to open a “dessert bar” next door, and has opened up the wall between the two units to allow inside access from the restaurant to the dessert bar. The dessert bar can accommodate 15 tables. With this change, a customer group arrives and is seated at a table in Hilltop restaurant as usual. However, when the customer group finishes eating dinner,…arrow_forward
- Cakes baked by the Freshfood Bakery are transported fromthe ovens to be packaged by one of three wrappers. Eachwrapper can wrap an average of 120 cakes per hour (Poissondistributed). The cakes are brought to the wrappers at therate of 300 per hour (Poisson distributed). If a cake sitslonger than 5 minutes before being wrapped, it will not befresh enough to meet the bakery’s quality control standards.Does the bakery need to hire another wrapper?arrow_forward12-15 The wheat harvesting season in the American Midwest is short, and most farmers deliver their truckloads of wheat to a giant central storage bin within a two-week span. Because of this, wheat-filled trucks waiting to unload and return to the fields have been known to back up for a block at the receiving bin. The central bin is owned cooperatively, and it is to every farmer’s benefit to make the unloading/storage process as efficient as possible. The cost of grain deterioration caused by unloading delays, the cost of truck rental, and idle driver time are significant concerns to the cooperative members. Although farmers have difficulty quantifying crop damage, it is easy to assign a waiting and unloading cost for truck and driver of $18 per hour. The storage bin is open and operated 16 hours per day, 7 days per week, during the harvest season and is capable of unloading 35 trucks per hour according to an exponential distribution. Full trucks arrive all day long (during the hours…arrow_forwardEliminating the queue of work dramatically quickens the time it takes a part to flow through the system. What are the disadvantages of removing those queues?arrow_forward
- In Children's Hospital in Seattle, there are, on average, 76 births per week. Mothers and babies stay, on average, four days before they leave the hospital. In Swedish hospital (also in Seattle), the average number of births per week is 234. Mothers and children stay in the hospital four days, on average. a. On average, how many new mothers are staying in Children's Hospital? Note: Round your answer to the nearest whole number. Number of new mothers b. On average, how many new mothers are staying in Swedish Hospital? Note: Round your answer to the nearest whole number. Number of new mothers c-1. The directors of the two hospitals are negotiating unifying the children wards of the two hospitals. They believe that by doing so they will be able to reduce the number of new mothers staying in the hospital. You may assume that the average number of births and the lengths of stay of the new mothers will not change. Are they correct? O Yes O No c-2. How many new mothers will stay, on average,…arrow_forwardA Company that makes shopping carts for supermarkets and other stores recently purchased some new equipment that reduces the labor content of the jobs needed to produce the shopping carts. Prior to buying the new equipment, the company used 4 workers, who produced an average of 87 carts per hour. Workers receive $13 per hour, and machine coast was $32 per hour. With the new equipment, it was possible to transfer one of the workers to another department, and equipment cost increased by $18 per hour while output increased by four carts per hour. a) Compute the multifactor productivity (MFP) (labor plus equipment) under the Prior to buying the new equipment. The MFP (carts/$) = .6949 (round to 4 decimal places). b) Compute the % growth in productivity between the Prior to and after buying the new equipment. The growth in productivity = 25.55 % (round to 2 decimal places)arrow_forwardCakes baked by the Freshfood Bakery are transported from the ovens to be packaged by one of three wrappers. Each wrapper can wrap an average of 200 cakes per hour. The cakes are brought to the wrappers at the rate of 500 per hour. If a cake sits longer than 5 minutes before being wrapped, it will not be fresh enough to meet the bakery’s quality control standards. Does the bakery need to hire another wrapper?arrow_forward
- A restaurant considers changing the number of waiters during dinner hours. There are currently seven waiters. It takes 70 minutes to serve a table on average. A new party (table) comes to the restaurant every 12.28 minutes. The restaurant considers decreasing the number of waiters by 1, down to 6. How much would the probability of walking into a completely busy restaurant increase when the number of waiters is 6 compared to 7? I need typed answer don't write in a paperarrow_forwardDo: 12-21 Truck drivers working for Juhn and Sons (see Problems 12-19 and 12-20) are paid a salary of $20 per hour on average. Fruit loaders receive about $12 per hour. Truck drivers waiting in the queue or at the loading gate are drawing a salary but are productively idle and unable to generate revenue during that time. What would be the hourly cost savings to the firm associated with employing two loaders instead of one? Not this: 12-19 Juhn and Sons Wholesale Fruit Distributors employs one worker whose job is to load fruit on outgoing company trucks. Trucks arrive at the loading gate at an average of 24 per day, or 3 per hour, according to a Poisson distribution. The worker loads them at a rate of 4 per hour, following approximately the exponential distribution in service times. Not this: 2-20 Juhn believes that adding a second fruit loader will substantially improve the firm’s efficiency. He estimates that a two-person crew, still acting like a single-server system, at the loading…arrow_forwardDuring the course of an 8-hour day, there are, on average, 5 students in an undergraduate advising office, and each student spends, on average, 10 minutes with an advisor.At what rate do students go to the advising office (in students per hour)?arrow_forward
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