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operations management
Practical Operations Management 2nd Edition Natalie Simpson - Solutions
Customers arrive an average of 10 per hour and an average of 16 customers can be served in an hour. Assuming this is an M/M/1 model, what is the average amount of time a customer spends in the system?
Customers arrive an average of 10 per hour and an average of 16 customers can be served in an hour. Assuming this is an M/M/1 model, what is the probability of no customers in the system?
The Kitti Kreme Donut production facility consists of three identical donut fry vats, each of which operated at 75% efficiency last month. If this facility produced a total of 150,000 donuts last week, what is the apparent effective capacity of one of Kitti Kreme's donut fry vats?
The effective capacity of a system is only 60% of its design capacity and its actual output is 80 units a day. If the system's design capacity is 300 units a day, how effi- cient is the use of this system?
Happy Pets Vet Clinic is considering renting a self-contained blood analysis machine for $500 a month, which would also require it to purchase the cartridges required for blood testing at $45 each. Happy Pets Vet Clinic treats an average of 20 dogs or cats a month requiring blood tests. (Happy Pets
Gallant Carpet Cleaning cannot meet demand with its current equipment. Gal- lant Carpet Cleaning is considering two new carpet cleaning machines. Machine A cleans carpets to residential standards, while machine B cleans and sanitizes carpets to hospital standards. Machine A costs $20,000 and
Cars arrive on average 10 minutes apart at a single toll booth with a Poisson arrival rate and an exponential service time averaging 1 minute. How often is this toll booth idle?
A system that is idle 50% of the time serves customers arriving at a rate of 10 an hour. Assuming this system fits the description of M/M/1, what is the average length of this service?
Almance Technology sells the Solar Cat Eye System, which generates electrical power from solar cells built into the bright reflective lenses embedded in the sur- face of roadways to mark the travel lanes. (These lenses are referred to as cat eyes because they reflect headlights brightly at night,
Tube Country rents circular rubber rafts that its customers use to float down the Ichituckni River. Tube Country owns a fleet of 200 rafts, each of which is returned on the same day it is rented, and each raft can only be rented once during a business day. Rough water along the Ichituckni River
You have purchased a smart phone that has a battery system advertised as allowing 22 hours of talk time before it requires recharging. A friend of yours advises you that it is a good phone, but the 22 hours of talk time is a highly theoretical number, based on ideal conditions concerning the
Auto Shoppe is considering the purchase of a new engine computer code reader for $65,000. Auto Shoppe can charge $75 for the service of reading the codes from a single car engine, while the actual cost of the reading would be only $10 per car engine.a. For how many cars would Auto Shoppe need to
Customers arrive at a ferry ticket office at the rate of 14 per hour on Monday morn- ings. This can be described by a Poisson distribution. Selling the tickets and pro- viding general information takes an average of 3 minutes per customer and varies exponentially. One ticket agent is on duty on
All trucks traveling on I-75 south of Ocala, Florida, must stop at a weigh station. This station has one set of scales, which can weigh an average of 18 trucks an hour, exponentially distributed. Trucks arrive at the weigh station at an average of 15 an hour, Poisson distributed.a. What is the
A single ATM is located on the ground floor of a shopping center. Service time at this machine is exponentially distributed. On average, the ATM can serve a customer in 2 minutes. Customer arrivals at the machine are Poisson distributed, with an aver- age of 25 customers an hour.a. What is the
Cars traveling from Canada to the United States through the Thousand Islands Border Crossing must stop for US Customs and Immigration. During the stop, each passenger in the car must present a passport for inspection by a US Customs Officer, answer questions, and declare certain valuables that may
The US Transportation Security Administration (TSA) operates six checkpoints for screening departing passengers at the Buffalo/Niagara International Airport. Each checkpoint consists of a baggage conveyor belt, CTX scanning/imaging machine, and a walk-through metal detector for passengers, although
When might it be desirable to have some amount of idle time at a workstation?
Of the four types of layouts discussed, hybrid layouts are historically the youngest. Which of the other three layout types is the oldest? Why?
The theoretical maximum cycle time of a product layout is the sum of the task times. How might it be argued that this would then no longer be a product layout?
Product layouts are vulnerable to disruption. What can a manager do to protect a highly efficient product layout from disruption?
Is a fixed-position layout actually a facility? Could it ever support a strategy other than make-to-order?
An 80,000 seat stadium was created with what kind of facility layout?
Designing a process layout focuses on determining what?
Name two disadvantages of a product layout.
The grouping of processes needed to perform the similar work for families of prod- ucts is known as what type of layout?
What closeness rating reflects indifference to the nearness or lack of nearness of two particular departments within a facility layout?
Two assembly lines build the exact same product. One assembly line has 15 work- stations and the other has 20 workstations. Which assembly line builds that product faster?
Two assembly lines build the exact same product. One assembly line has a cycle time of 30 seconds and the other a cycle time of 90 seconds. Which assembly line has more workstations?
Which would be expected to be less expensive to the customer, a product that resulted from a make-to-stock process or the same product from an assemble-to-order process?
Which would be expected to offer greater variety to the customer, a product that resulted from a make-to-stock process or the same product from an assemble-to- order process?
Would reducing the cycle time of a product layout speed up its production or slow it down?
Project management is most likely to be associated with production within which of the four layout types?
Process layouts are often designed according to what objective?
A production line is to be designed to assemble a product. The assembly of this product requires three tasks, one of which requires 0.3 minutes to complete, one of which requires 1.4 minutes to complete, and one of which requires 0.7 minutes to complete. What is the minimum possible cycle time of
A production line is to be designed to assemble a product. The assembly of this product requires three tasks, one of which requires 0.3 minutes to complete, one of which requires 1.4 minutes to complete, and one of which requires 0.7 minutes to complete. If this production line has three
A production line must produce 1,500 units every 4 hours of operating time. What is its cycle time in seconds?
A production line must produce 900 units every 10 hours of operating time. What is its cycle time in minutes?
If a production line has a cycle time of 90 seconds, how much can it produce in 8 hours?
An assembly line must create one finished product every 90 seconds. The sum of the task times required to create a product is 295 seconds. What is the theoretical minimum number of workstations for this assembly line?
An assembly line must create one finished product every 90 seconds. The sum of the task times required to create a product is 295 seconds. If one design for this assembly line uses four workstations, what is its efficiency?
What is the balance delay of an assembly line that is 65% efficient?
A food court has a row of four locations available for food vendors. The food court manager must decide which of four food vendors should be assigned which loca- tions. Technically, any food vendor could be assigned any one of the four locations. The four food vendors who wish to rent locations
You are standing outside Thompkin Bus Manufacturing Company, watching one finished school bus roll off their assembly line every 15 minutes. An employee, tak- ing a break nearby, proudly states: "We build 40 of those buses every day, Monday through Friday." Based on what you see and have been told,
An average of 50 customers travel between departments A and B each day. Unfor- tunately, department C is located between departments A and B, and no customers travel between department C and departments A and B. What is the load-distance score of this three-department layout?
An assembly line must create one finished product every 2 minutes. The sum of the task times required to create a product is 200 seconds. What is the theoretical minimum number of workstations for this assembly line?
Two different companies produce and sell a certain product to customers. Each of the two companies starts with the same raw materials and creates the product through three stages of processing. But each of the two companies uses a different strategy to create the product, shown in the process flow
It takes a total of 400 seconds for one technician, working alone, to assemble one AirRules smartphone. However, AirRules manufactures its smartphones with 20 technicians staffing a 20-station assembly line, producing one smartphone every 30 seconds. Based on this information,a. How many hours must
Digital Eye must design an assembly line to produce a new line of slim digital cam- eras. Assembling a single camera requires the completion of nine distinct tasks, and information about each of these tasks is provided below:This assembly line operates 8 hours a day to produce 576 digital cameras
An industrial food processor needs to design a product layout for a new product, mint chocolate chip sandwiches. The company plans to use this new production line 8 hours a day to meet projected demand of 1,440 cases per day. The follow- ing table describes the tasks involved in the production of a
Consider the following diagram of a fast-food restaurant drive-through with three stops for each car following the path described by arrows in the diagram below. The time required to complete the work at each of these workstations is also listed here:a. What is the maximum rate at which this
Palms Coast Hospital is designing a new building and has determined the closeness ratings between the eight departments that must be located on the ground floor of that structure. These ratings are as follows:a. Palms Coast considers it absolutely necessary that Admitting be located next to what?b.
Linlithi Medical provides on-site health screenings for other organizations, and has been hired by the City of Baltimore to conduct the annual health screening of all 250 of Baltimore's bus drivers. The annual health screening for a bus driver consists of the following tasks:Linlithi Medical has
Consider the following four departments (A, B, C and D) in this facility layout diagram:An average of 25 customers travel between departments A and C each day, and an average of 10 customers travel between departments C and D each day. There is no other customer traffic between any other pairs of
Ted's Eats operates three food trucks that sell cooked lunches to employees throughout a crowded downtown area. The layout within each of the three trucks is identical, being divided evenly into six areas, three on the driver's side of the vehicle and three on the passenger's side. Each truck
Brightland Tech has just been awarded a contract to supply memory boards to a large consumer electronics manufacturer. Brightland must set up an assembly line to produce those memory boards at a rate of 300 boards per hour. Assembly of a single memory board requires completion of nine tasks, which
Myer Wine Racking and Cellar Company is a small but growing carpentry job shop that specializes in natural- finish redwood racking systems for storage and display of wine bottles. These racks and cabinets are created by processing redwood lumber through a series of work centers to reduce it to
Which is more important, strategic or tactical decision making?
How does the hierarchy of decision making relate to these four categories of opera-tions: production, project, event, and incident management?
Why is the measurement of productivity more challenging in the provision of ser-vices, when compared to measuring the productivity of a goods-producing operation?
What are the advantages that can be gained if a product does not necessarily need to be consumed at the place it is produced, and how does this relate to supply chain management?
Does a pure good exist? If so, what would be an example? Can a pure service exist?
Why would sustainability alone not necessarily guarantee the survival of an organization?
Identify several situations in which more than one of the following would be practiced simultaneously: production management, project management, event management, and incident management.
Consider a shipping company that carries freight by truck. Name three inputs to this operation.
Value-added refers to the difference in the overall value of what and what?
In the hierarchy of decision making, what level is below strategic decision making?
Does a service operation usually experience higher or lower variability in its inputs and outputs, when compared to goods production?
Ethics are principles that define what?
What is the farthest point in the future considered in decision making called?
Optimization refers to the identification of what?
What are tangible goods awaiting sale or use called?
Which involves the greatest degree of uncertainty, an event or an incident?
What does NGO stand for?
Does a service operation often require higher or lower capital investment at start-up, when compared to goods production?
Is the objective of efficiency likely to be more central to planning in production or incident management?
A bank must decide which branch office to assign the account of a particularly important and high-maintenance client. Is this an example of a strategic, tactical, or implementation level of decision?
A bank must decide if a particular branch office should be closed and its current location sold to another bank. Is this an example of a strategic, tactical, or imple- mentation level of decision?
A bank has just received an electronic signal that one of its ATMs is out of service due to a lack of cash to distribute. The bank must decide whether to send a courier to restock the ATM immediately (after business hours) or to allow it to remain out of service until the main banking operation
An organization must decide whether a particular shipment should be sent by air freight or surface (ground) trucking. Is this an example of a strategic, tactical, or implementation level of decision?
An organization must decide between Singapore, London, or Buffalo as the location for the construction of a new manufacturing facility. Is this an example of a strate- gic, tactical, or implementation level of decision?
A small company used a total of $10,000 in resources to provide $15,000 in services, while its competitor used a total of $15,000 in resources to provide twice the value in services during the same period. Which company provided more value-added, and by how much?
You are the overnight shift manager at a large resort hotel and need to complete next week's work schedule for distribution to your employees. During your shift, someone calls to report a strong smell in one wing of the building. Your boss, the general manager, sends you an email message, asking
Consider the following four situations: negotiating a lease for drilling oil, drilling for oil, refining fuel from oil, and transporting fuel orders to retail locations by tanker trucks. Now consider the following grid, which indicates four positions marked A, B, C, and D. Each of these positions
Consider the following five situations: maintenance of a network of ATMs, produc- tion and packaging of cake mix, a barn raising in which an entire fast-food restau- rant is torn down and completely replaced in 48 hours, hosting and promotion of the performance of a touring musical group, and
Consider the following five operations: constructing a luxury cruise ship, operating a casual dining restaurant, staging a professional sports match, manufacturing a patented drug, and rescuing stranded animals from a flooded area. Now consider the following grid, which indicates five positions
Cleanex Bleach can be purchased at JayMart and Tartan Retail Centers, Freshway Supermarkets, and through the retail platform Taniwha Online. Both JayMart and Tartan buy Cleanex Bleach directly from the manufac- turer Cleanex, which ships this product straight to their own local distribu- tion
A friend complains that a 20-ounce bottle of Pambula Springs water costs \($5\) to purchase during a concert at a local sports arena, yet an identical bottle of Pambula Springs costs only \($2\) to purchase at a convenience store down the street from the arena building. You have seen that same
Convex Productions produces full-length motion pictures for distribution worldwide. Convex has just purchased the rights to a movie script entitled Native Sun, which it intends to develop as its next project. Native Sun is the story of an orphaned human raised by an alien race, visiting Earth on
Where are the boundaries of an organization's value statement? Should it look for these values in itself, its immediate business partners, and/or the partners of its partners?
Should the value statement of an organization always match the values of its customers?
Why is the measurement of productivity more challenging in the provision of ser- vices, when compared to measuring the productivity of a goods-producing operation?
Why would high productivity not necessarily guarantee competitiveness?
What is the relationship between planning and decision making? Do these two activities always occur simultaneously? Does one depend upon the other?
In a vision statement, an organization carefully describes its desires concerning what?
Is a highly standardized product usually produced through a make-to-order or a make-to-stock processing strategy?
Does providing customized products generally involve less capital investment or less skilled labor, when compared to more standardized products?
If a product is produced in high volume by a few large organizations, what phase of the product life cycle is it most likely in?
The product life cycle suggests that what will happen to the price of a product as it ages?
At what phase of the product life cycle are the most organizations offering the product to the customer?
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