Ops Mgmt Exam 1 Practice
True or False: Specialization increases the costs of labor as specialists will command a higher wage rate.
False
15 nurses and takes 1.5 hours to complete one patient visit. a) capacity of nurse team over course of 9 hour workday? b) demand is 60 patients per day, what is utilization? c) what is cycle time?
a) 90 patients per 9 hour day b) 67% c) 9 minutes per patient
Which of the following items would be considered a resource in the operations of a movie theater? a) popcorn b) projector c) printer ink d) floor cleaner
b) projector
Does takt time increase or decrease if demand rate increases?
decreases
T or F: If customers want to have 1000 units over 10 days, one should aim at producing 100 units per day instead of doing 111 units per day in the beginning and then having a little safety buffer at the end.
True
T or F? if the batch size is increased, inventory increases, which implies that flow units are likely to spend more time in the process
True
True or False: if the flow rate of a process increases, then the utilization of a resource with a setup time must also increase.
True
Which of the following is not a dimension or sub-dimension in a customer's utility function? a) convenience b) price c) location d) customer satisfaction e) performance
d) customer satisfaction
Which of the following inefficiencies in a grocery store's operations results from inflexibility? a) leftover fruits and vegetables b) delivery delays from the warehouse c) a surge in customer arrivals at one time d) employee work schedules set a week in advance
d) employee work schedules set a week in advance
Below is a slogan used for advertisement. What dimension of customer utility does the slogan emphasize? Our dealership network provides service, wherever in the country you may be. a) fit b) timing c) price d) location e) performance
d) location
does an operation require more of fewer workers if the takt time increases?
fewer workers
T or F: Genchi Genbutsu requires the implementation of a pull system
False
T or F: In a service operation, we can compute the value add time by simply looking at the labor content.
False
T or F: Kaizen favors automation and investment in technology.
False
T or F: Taiichi Ohno built the Toyota Production System with the metaphor of a tiger in mind. Rapid and decisive movements were in his view the best way to match supply with demand.
False
True or False: A computer server experiences large fluctuations in the amount of data requests it receives throughout the day. Because of this variation, Little's Law does not apply.
False
True or False: The efficient frontier is given by the cheapest company in the industry.
False
True or False: There can be no more than two firms on the efficient frontier.
False
it takes a lawyer 123 minutes to serve one customer. demand is 2 customers per 8 hour day. the lawyer has a wage rate of $150 per hour from a law firm. what is the cost of direct labor for the lawyer expressed in $ per customer?
$600 per customer
T or F: Following the announcement of a major quality problem, the share price of a company falls substantially. This decrease is a result of assignable cause variation.
True
True or False: If the takt time is shorter than the cycle time, the process needs to run faster.
True
You look at a process that has three activities, each one can potentially go wrong. How many leaves does the event tree of this process have? a) 2 b) 3 c) 8 d) 24
c) 8
Below is a slogan used for advertisement. What dimension of customer utility does the slogan emphasize? We match any price in town. a) fit b) timing c) price d) location e) performance
c) Price
Which car company is most associated with the term lead operations? a) General Motors b) Ford c) Toyota d) Honda
c) Toyota
Which of the following operations decisions correspond to the consumption utility component of the consumer utility function? a) When will the demand be fulfilled? b) How efficiently will the products or the services be delivered? c) What is the product or service to be delivered? d) Where will the demand be fulfilled?
c) What is the product or service to be delivered?
Consider the baggage check-in process of a small airline. Check-in data indicates that from 9-10am, 240 passengers checked in. Moreover, based on counting the number of passengers waiting in line, airport management found that the average number of passengers waiting for check-in was 33. How long did the average passenger have to wait in line?
8.3 minutes
what is the maximum utilization a resource can achieve? a) value equal to the demand b) value equal to the capacity c) there is no maximum utilization d) 1.00
d) 1.00
which of the following items would be considered resources in a restaurant? a) recipes b) food c) brand image d) chefs
d) chefs
it takes a barber 10 minutes to serve one customer. a) capacity expressed in customers per hour? b) flow rate assuming demand is 5 customers per hour? c) what is the utilization? d) cycle time?
a) 6 customers/hour b) 5 customers/hour c) 83.33% d) 12 minutes/customer
A company makes two models, A and B. Which of the following production schedules is more level? a) ABABABABAB b) AAAAABBBBB
a) ABABABABAB
Below is a slogan used for advertisement. What dimension of customer utility does the slogan emphasize? We build lenses uniquely to the needs of your eyes. a) fit b) timing c) price d) location e) performance
a) Fit
A worker in charge of assembling a bicycle finds a faster way to mount the pedals. He turns to his supervisor. The supervisor explains that the process had been optimized by the engineering department and so the worker should make sure to stick with the existing procedures. The work of which management scholar does this fit best? a) Taylor b) Ohno c) Womack d) Fujimoto
a) Taylor
Over the course of a month, which of the following is most likely to describe an appropriate flow unit for a process analysis of a hospital? a) the number of physicians b) the number of beds c) the square footage of the building d) the number of patients
d) the number of patients
In the production of pizza, which of the following four variables is not an input variable? a) The amount of dough prepared for the pizza b) The temperature of the oven c) The type of cheese on the pizza d) The time that the customer leaves the pizza in the fridge
d) the time that the customer leaves the pizza in the fridge
If a process has a six sigma capability, what is the process capability index? a) 1 b) 2 c) 6 d) 12
b) 2
In the welding operations of a bicycle manufacturer, a bike frame has a flow time of about 12.55 hours. The time in the welding operation is spent as follows: 2 hours waiting in front of the cutting machine for the batch to start, 1 hours waiting for the setup of the machine, 2 hour waiting that the other pieces of the batch go through cutting, 1 minute at the cutting machine, and 3 hours waiting for the transfer to the welding machine. Then, at the welding machine, the unit spends 1 hour waiting in front of the welding machine for the batch to start, 2 hour waiting for the setup of the welding machine, 0.55 hours waiting that the other pieces of the batch go through cutting, 0.35 minutes at the welding machine, and 1 hour waiting for the transfer to the next department. Determine the exact flow time. what is the value-added percentage of the flow time?
.1790%
A company making tires for bikes is concerned about the exact width of their cyclocross tires. The company has a lower specification limit of 22.9 mm and an upper specification limit of 23.2 mm. The standard deviation is 0.17 mm and the mean is 23.05 mm. What is the process capability index for the process?
.2941
8 people called a reservation desk for a ferry service between 8am and 8:25am. Based on this information, what is the flow rate of callers?
0.3 per minute
A chemical process involves adding various agents to a vat and then waiting for the agents to react to make a final compound. the vat holds up to 1000 gallons. chemical agents are added to the vat at a rate of 4.5 gallons per minute. once the agents have been added to the vat, the reaction takes 85 minutes no matter the actual number of gallons in the batch. cleaning always takes 15 minutes. what is the setup time of this process?
100 minutes
A copy machine is available 24 hours a day. On a typical day, the machine produces 94 jobs. Each job takes about 3 minutes on the machine, 2 minutes of which is processing time and 1 minute is setup time (logging in, defining the job). About 19% of the jobs need to be reworked, in which case the set-up time and the processing time have to be repeated. The other time, the equipment is idle. What is the OEE of the equipment?
13.1%
LaVilla is a village in the Italian Alps. Given its enormous popularity among Swiss, German, Austrian, and Italian skiers, all of tis beds are always booked in the winter season and there are on average 1550 skiers in the village. On average, skiers stay in LaVilla for 10 days. How many new skiers are arriving-on average-in LaVilla every day?
155 skiers
The welding department supplies parts to the final assembly line. Management decides to implement a kanban system and has collected the following data. • The daily demand is 1500 units • The production lead time is 5 days (this includes processing time, transport time, and waiting time) • Management has decided to have a 1 day(s) safety stock • One container fits 425 units How many kanban containers will be needed to support this system?
22 containers
One of 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 10 minutes. How many skiers are riding on the lift at any one time?
300 skiers
Patients take a drug for severe acne for 3 months and there are 100,000 new patients each month. How many patients are taking this drug on average at any given time?
300,000 patients
a machine makes 3 different components that are used in a gyroscope. call these components; A, B, C. the following repeating schedule is used to make components: make 100 A, 50 B, 200 C. How many components are made in the production cycle?
350
A campus deli serves 300 customers over its busy lunch period from 11:30am to 1:30pm. A quick count of the number of customers waiting in line and being served by the sandwich makers shows that an average of 11 customers are in process at any point in time. What is the average amount of time that a customer spends in process?
4.4 minutes
For 137 consecutive days, a process engineer has measured the temperature of champagne bottles as they are made ready for serving. Each day, she took a sample of 5 bottles. The average across all 685 bottles (137 days, 5 bottles per day) was 49 degrees Fahrenheit. The standard deviation across all bottles was 1.2 degrees Fahrenheit. When constructing an X-bar chart, what would be the center line?
49 degrees Fahrenheit
Sarah's soap company makes 4 soaps and the demand is 125 regular, 130 lavender, 95 citrus, and 75 tea. the production process can produce any soap at rate of 500 kgs per hour but 1.5 hours are needed to switch between scents. during those times, the process doesn't produce any soap. how many kgs of "regular" should sarah produce before switching over to another scent?
5,000 kgs
Last year there were 2,700,000 visitors to a national park and, on average, each visitor spent 17 hours in the park. On average, how many visitors were in the park at any particular time last year?
5,240 visitors
A consulting company must hire 18 new associates per year to replace those who have left the company for other positions or have retired. The company employs 103 associates overall. How long is the average associate employed at the consulting company?
5.7 years
A large-scale bakery is laying out a new production process for their packaged bread, which they sell to several grocery chains. It takes 12 minutes to bake the bread. How large of an oven is required so that the company is able to produce 4000 units of bread per hour (measured in the number of units that can be baked simultaneously)?
800 units
Which of the following operational decisions correspond to the convenience component of the consumer utility function? (more than one answer) a) When will the demand be fulfilled? b) How efficiently will the products or the services be delivered? c) What is the product or service to be delivered? d) Where will the demand be fulfilled?
A and D
There are 4 hotels competing with otherwise very similar products on the dimensions of price ($ per night) and amenities (measured by the number of stars (*) awarded by customer reviews). Which of these hotels are on the efficient frontier? a) Hotel A: price = $200 per night; rating: *** b) Hotel B: price = $150 per night; rating: **** c) Hotel C: price = $300 per night; rating: ***** d) Hotel D: price = $80 per night; rating: **
B, C, and D
What are the two pillars of the TPS?
Built in quality and Just-in-time
You measure the exact size of 100 ping pong balls from manufacturer A and then of another 100 balls of manufacturer B. The balls of manufacturer B have a much larger variation. Means and specification limits for the two manufacturers are identical. Which of the two manufacturers has a higher process capability index?
Manufacturer A
Yes or No: Two retailers compete on costs and ambience of the retail store. They are identical on all other dimensions of customer utility. Retailer A is cheaper than retailer B. Retailer A also has the better ambience. Does this mean that retailer A is on the efficient frontier?
Yes
Consider again the company making tires for bikes is concerned about the exact width of their cyclocross tires. The company has a lower specification limit of 22.6 mm and an upper specification limit of 23 mm. The standard deviation is 0.14 mm and the mean is 22.8 mm. a) what is the probability that a tire will be too narrow? b) what is the probability that a tire will be too wide? c) what is the probability that a tire will be defective?
a) .0766 b) .0766 c) .153
resource 1 - 10 min processing time, resource 2 - 8 min processing time, resource 3 processing time. a) what is capacity of resource 2? b) what is bottleneck in process? c) what is utilization of resource 2? d) how long does it take the process to produce 205 units starting with empty system?
a) 0.124 units per minute b) resource 1 c) 80% d) 2,065 minutes
16 minute setup, .19 minute production per board. a) produce 525 boards between setups, what is capacity of machine? b) what is utilization with 525 boards? c) demand rate of 2 boards/min, what is smallest batch size such that the machine doesn't constrain flow rate through the process?
a) 4.54 boards per minute b) 86.18% c) 51.61 batch size
depositing set up time 49 min and processing time .2; patterning setup 34 min processing .2; etching setup 17 min processing .25. a) what is process capacity in units per hour with batch size of 50 wafers? b) what is utilization of depositing if the batch size is 50 wafers?
a) 51 units per hour b) 17%
Which of the following statements about Pareto diagrams are correct? a) The Pareto diagram shows the possible root causes of a problem with the number of defect occurrences b) The Pareto diagram shows the process capability index over time c) The Pareto diagram shows the mean of a random sample at various points in time d) The Pareto diagram shows a visual representation of binary outcome variables
a) The Pareto diagram shows the possible root causes of a problem with the number of defect occurrences
Which of the following definitions describes a robust process? a) A process is robust if it can tolerate variation in input and environmental variables without producing a defect b) A process is robust if it has a lot of automation built in c) A process is robust if it used control charts. d) A process is robust if its process capability index is greater than 1
a) a process is robust if it can tolerate variation in input and environmental variables without producing a defect
you observe a long line at the airport security. the process currently is: a) capacity constrained b) demand constrained c) unconstrained d) linearly constrained
a) capacity constrained
A process is replicated in another country where wages are 50% lower. Staffing and processing times are identical. what would be the effect on the costs of direct labor? a) costs of direct labor would by 50% lower b) costs of direct labor would be the same c) costs of direct labor would be 50% higher d) can't be determined from the given information
a) costs of direct labor would be 50% lower
A company is increasing the percentage value add time in the operation. Their value add time and their flow rate remain unchanged. What will happen to their inventory turns (recall from chapter 2 that inventory turns are computed as flow rate divided by inventory)? a) go up b) stay same c) go down
a) go up
what happens to the number of kanban cards in the process if the replenishment time goes up? a) increases b) stays the same c) decreases
a) increases
A car manufacturer has designed a "special edition" version of its popular two-door coupe. This special edition has increased horsepower compared to the standard model and a sports suspension. Which dimension of the customer utility function is particularly emphasized with the "special edition" coupe? a) performance b) fit c) price d) timing
a) performance
Which of the following characteristics is a subcomponent of consumption utility in a customer utility function? a) performance b) location c) timing d) price
a) performance
Which of the following objectives is more important in a pull system? a) producing at the rate of demand b) keeping the equipment utilization
a) producing at the rate of demand
the primary purpose of the "Single minute exchange of die" philosophy is to: a) reduce the setup time for a resource b) increase the flow rate of a process c) decrease the utilization of a process d) eliminate resources that have setup times
a) reduce the setup time for a resource
which of the following statements about takt time and cycle time is true? a) takt time only depends on demand, cycle time does depend on capacity b) takt time only depends on capacity, cycle time does depend on demand c) takt and cycle time only depend on capacity d) takt and cycle time only depend on demand
a) takt time only depends on demand, cycle time does depend on capacity
A non-bottleneck worker currently has an idle time of 20 seconds per unit. Because of the large demand, the company improves the process by adding more capacity to the bottleneck. How does this impact the idle time of the worker? a) the idle time would decrease b) the idle time would stay the same c) the idle time would increase d) can't determine from the given information
a) the idle time would decrease
Stopping the line can cause a loss of output. For this reason, an employee should stop the line: a) whenever a problem occurs b) whenever the employee sees the cost of stopping the line as lower than the costs of not stopping c) whenever he/she needs to go on a break d) never
a) whenever a problem occurs
Which of the following operations decisions correspond to the price component of the consumer utility function? a) When will the demand be fulfilled? b) How efficiently will the products or the services be delivered? c) What is the product or service to be delivered? d) Where will the demand be fulfilled?
b) How efficiently will the products or the services be delivered?
Which of the following questions is not related to Operations Management? a) When will the demand be fulfilled? b) How much do we pay the CEO? c) Who are the customers? d) How efficiently are the products or services delivered? e) Where will the demand be fulfilled? f) What is the product or service?
b) How much do we pay the CEO?
John is a newly minted quality engineer at MakeStuff Inc. His boss tells him to increase the process capability index of their main product. John is somewhat lazy and so he does not want to tackle the variation in the process. So he decides to simply increase the upper specification limit and reduce the lower specification limit. Does this increase the process capability index? a) No, it does not, as the variation in the process stays unchanged b) Yes, it does, though one might question if the underlying process is really better c) That depends on many other variables, including the control limits d) No, the process capability index would only change if the control limits were changed
b) Yes, it does, though one might question if the underlying process is really better
Which of the following items would be considered a resource in the operations of a soft drink manufacturer? a) water b) bottling machines c) empty bottles d) sugar and/or concentrate
b) bottling machines
Custom-built windows are designed and produced for the unique needs of a particular building. Which dimension of the customer utility function is particularly emphasized with the concept of "custom-built"? a) performance b) fit c) price d) location
b) fit
Which of the following questions would be asked in a process analysis of a college admissions office? a) when was the college founded? b) how long does it take the office to process an application? c) how much is the yearly tuition at the college? d) how long does it take the average student to complete a degree program at the college?
b) how long does it take the office to process an application
You and 3 friends run a car wash for a fundraiser. you spend 40 minutes per vehicle. you are so successful that the next day you invite 4 more to help. how does this impact the labor content? a) goes up b) stays the same c) goes down d) can't determine
b) labor content stays the same
Because of long set-up times, a company chooses to run big production batches. Which of the following actions will level the production schedule? a)Using overtime b) Mixing the models on the final line c) ToyotaMaking sure that rework is kept low d) Reducing the waste of the process
b) mixing the models on the final line
Over the course of a day, fans pour into a NASCAR venue at the rate of 8,000 people per hour. The rate at which fans leave the venue a) must be less than 8,000 people per hour b) must be exactly 8,000 people per hour c) must be more than 8,000 people per hour d) could be more or less than 8,000 people per hour
b) must be exactly 8,000 people per hour
What happens to target manpower if the labor content is doubled? a) target manpower increases by 50% b) target manpower doubles c) target manpower decreases by 50% d) target manpower decreases by a factor of 2
b) target manpower doubles
What is the relationship between the number of Kanban cards in a process and the inventory level? a) there is no relationship b) there never can be more inventory in the process than what was authorized via kanban cards c) the inventory of the process grows with the square root of the number of kanban cards d) the inventory of the process can be reduces by adding more kanban card
b) there never can be more inventory in the process than what was authorized via kanban cards
what is the relationship between the processing time at a resource and its capacity? a) they are the same b) they are reciprocals of each other c) they are multiples of each other d) they aren't related
b) they're reciprocals of each other
A national restaurant chain has just opened a sit-down location at Chicago's O'Hare International Airport. Next to the sit-down location, it has also established a "to-go" section where travelers can purchase pre-made sandwiches and salads as well as drinks and snacks. Which dimension of the customer utility function is particularly emphasized with the "to-go" section? a) fit b) timing c) price d) performance
b) timing
Below is a slogan used for advertisement. What dimension of customer utility does the slogan emphasize? Get your burger in 1 minute or less - otherwise, you eat free a) fit b) timing c) price d) location e) performance
b) timing
Henry Ford proclaimed "you can have any color you want, as long as it is black". which of the following best reflects his motivation for this position? a) he believed that customers didn't actually like other colors, so why go through the hassle of making different color cars? b) with more than one color, the process would have switch over times and that could reduce the overall utilization of the process c) he wanted to establish "black" cars as part of his company's brand image at the time d) assembling non-black cars takes longer than black cars e) he understood that increasing inventory in a process can lead to a longer flow time through the process
b) with more than one color, the process would have switch over times and that could reduce the overall utilization of the process
In a p-chart, the upper control limit is how many estimated standard deviations above the average p-bar? a) 1 b) 2 c) 3 d) 6
c) 3
a manager is concerned that there isn't enough time spent on production and too much time spent on setups. the manager decides to double all production batch sizes. this change has no impact on demand. what impact will this likely have on the average inventory in the process? a) average inventory will decrease because the capacity of the resources will increase b) average inventory will remain the same because demand hasn't changed c) average inventory will increase because larger batches require more time to be completed
c) average inventory will increase because larger batches require more time to be completed
Which of the following items would be considered an input in the operations of a soft drink manufacturer? a) brand image b) bottling machines c) empty bottles d) workers
c) empty bottles
Which of the following is not one of the three system inhibitors? a) waste b) variability c) fatigue d) inflexibility
c) fatigue
the batch size is tripled on a resource that has a setup time. what is the likely impact on the resource's capacity? a) decrease by 1/3rd b) decrease by less than 1/3rd c) increase by less than 300% d) increase by 300%
c) increase by less than 300%
which of the following is most likely to be a concern if batches are very large? a) the flow rate will be too high b) utilization will be too high c) inventory will be too high d) too much time will be spent on product change overs
c) inventory will be too high
What are the subcomponents of inconvenience in a customer utility function? a) location and price b) price and volume c) location and time d) time and performance
c) location and time
Which of the following items would be considered an input in the operations of a doctor's office? a) examination table b) nurse c) needle d) stethoscope
c) needle
From the perspective of process analysis, which of the following could be appropriate flow units for a hardware store? a) number of workers b) number of cash registers c) number of customers d) number of suppliers
c) number of customers
you are sitting in a restaurant and the waiter brings you the food that you ordered a while ago. if you think about you being the flow unit in the process of the restaurant - which step of this process will be downstream relative to your current position in the process? a) waiting to order b) being seated at a table c) paying the bill d) reviewing the menu
c) paying the bill
how does the takt time change as the demand rate increases? a) takt time increases b) takt time stays the same c) takt time decreases d) can't be determined
c) takt time decreases
you observe a bank and notice that a customer leaves the bank about every five minutes. these five minutes between customers are: a) the capacity of the process b) the processing time of the last resource c) the cycle time d) the lead time
c) the cycle time
The information turnaround time is driven primarily by: a) The number of workers b) The IT system c) The inventory in the process d) The amount of waste in the process
c) the inventory in the process
Which of the following elements is not part of an X-bar control chart? a) The long run center line, X-bar-bar b) The control limits, LCL and UCL c) The specification limits LSL and USL d) X-bar values from each sample
c) the specification limits LSL and USL
a product requires 4 parts that are made of the same lathe. call them A, B, C, and D. the product requires 1 A, 2 B, 4 C, 8 D. which of the following production cycles is most appropriate? a) A:100, B:100, C:100, D:100 b) A:101, B:102, C:104, D:108 c) A:100, B:150, C:200, D:400 d) A:100, B;200, C:400, D:800
d) A:100, B;200, C:400, D:800
Which of the following terms is not part of the Toyota Production System (TPS)? a) Ikko-nagashi b) kanban c) jidoka d) yakimono e) genchi genbutsu
d) yakimono
Below is a slogan used for advertisement. What dimension of customer utility does the slogan emphasize? The fastest internet in the nation. a) fit b) timing c) price d) location e) performance
e) performance
Is the capacity of the bottleneck larger than, equal to, or smaller than the capacity of the process?
equal to
T or F? increasing the batch size on a resource with setups always increases the capacity of the process.
false
Which of the following statements about Kanban are accurate? a) I. Deploying the Kanban system leads to pulling work through the system instead of pushing work b) II. Deploying the Kanban system leads to pushing work through the system instead of pulling work. c) III. The Kanban system controls the work in process inventory d) IV. Kanban will always reduce the amount of inventory in the process e) V. Kanban requires cross-training all workers f) I and II g) I and III h) I and IV
g) I and II
SmartPhones are made on a 40-step assembly process. all 40 steps are connected through a conveyer belt and all of the 40 steps much work at the same rate even if some of them have more capacity than others. if this process a machine-paced process or a worker-paced process?
machine-paced process
An orthopedic surgeon has read an article about the Toyota Production System and now wants to organize her surgery operation based on lean principles. To eliminate all idle time in the operating room, she decides to call in patients six hours before the scheduled surgery time. Is this a lean process?
no
an executive declares that his company has achieved an OEE of 115%. is this possible?
no
You observe a vehicle registration department at your local township. assume that all employees are ready to work at 9am. you arrive at 9am sharp and are the first customer. is your time through the empty process longer or shorter than flow time averaged across all customers that arrive over the course of the day?
shorter than the average flow time
A process has low fixed cost and high variable costs. It is currently capacity constrained. Will the impact of an efficiency improvement be small or large?
small