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business
operations management

Questions and Answers of Operations Management

Suppose a manager must construct either a mean chart with known variation or a p-chart to monitor some process. When the process is in control, the manager wants only 1.92% of the samples taken to
An office supply company manufactures paper clips, and even tolerates a small proportion of those paper clips being defective (incorrectly shaped and/or twisted) in its outgoing product. (The company
A beverage company would like to use a mean chart to monitor how much liq- uid beverage it puts into each 500-ml bottle. They know from past experience that whenever this process is under control,
A large beverage company would like to use statistical process control to monitor a new bottling machine designed to load liquid into 350-ml bottles. This company knows that the exact amount the
A manager wants to monitor the proportion of red candies present in a five-color candy mix. For 8 hours, the manager has gathered exactly 50 candies every hour, by randomly selecting and emptying one
You are visiting the Engineering Office of Denton Hospital, as part of a consulting project. You notice some charts on one wall which look familiar to you:One of the employees notices you reading the
VitaComp manufactures nonpharmaceutical pills and pellets from dry ingredients, using a collection of machinery it maintains in a large job shop. Machine AA-23 molds circular pellets to an average
Vigilance Inc. provides secret shopping services to assist other companies in quality control. Vigilance has just been awarded a contract by Freshway Supermarkets to monitor the customer service
How could bottleneck management's recommendations concerning the distinction between activation and utilization relate to personal time management?
How can work be urgent without being important?
Consider an incentive system that simply rewards production output. How can this system hurt an organization with a distinct bottleneck operation? What part of the organization will be hurt the most?
A major advantage of using SPT is the minimization of average flowtime. What is a disadvantage of the use of SPT?
Give an example in which more than one priority rule is used simultaneously to create a sequence.
The total amount of time required to complete a schedule is called what?
Line balancing is a technique for scheduling for a system that produces at what level of volume?
Do deadlines determine the timing in forward or backward scheduling?
Critical ratio is calculated as the time remaining divided by what?
What does using Johnson's rule to schedule two work centers minimize?
Does scheduling according to shortest processing time tend to minimize average flowtime or average tardiness?
Does scheduling according to earliest due date tend to minimize average flowtime or average tardiness?
If a job is finished 4 days early, what is its tardiness?
Dispatching involves the assigning of what?
Is recognizing capacity constraints when developing a schedule called finite or infi- nite loading?
The length of time a job spends in the system is referred to as what?
What priority sequencing rule is usually used to order customers standing in a line?
Job Alpha requires 2 weeks of work and is due in 4 weeks. What is the critical ratio for this job?
Job Alpha is due in 4 weeks. If the flowtime for this job is 2 weeks, what is this job's tardiness?
Job Alpha requires 2 weeks of work and job Beta requires 3 weeks of work. If job Alpha is completed first and job Beta is completed next, what is the flowtime for job Beta?
The flowtime of the last job in a single work center's schedule is 7 days. What is the makespan of this schedule?
Job Tango is due in 4 weeks. If the flowtime for this job is 6 weeks, what is this job's tardiness?
Job Victor requires 8 weeks of work and job Tango requires 2 weeks of work. If job Victor is completed first and job Tango is completed next, what is the tardiness for job Tango if it is due in 4
All work orders at a bakery require prep and then baking. An order for a single birth- day cake requires the least amount of baking of all orders for the day. Assuming the bakery wishes to minimize
All work orders at a bakery require prep and then baking. An order for a batch of baked apples requires the least amount of prep of all orders for the day. Assuming the bakery wishes to minimize the
Consider the following three jobs: Job Alpha requires 2 weeks of work and is due in 4 weeks. Job Beta requires 3 weeks of work and is due in 5 weeks. Job Carlos requires 1 week of work and is due in
Consider the following three jobs: Job Alpha requires 2 weeks of work and is due in 4 weeks. Job Beta requires 3 weeks of work and is due in 5 weeks. Job Carlos requires 1 week of work and is due in
Suppose you have three jobs waiting to be completed, and you must determine the sequence in which these jobs should be worked on. You calculated the critical ratio for each of the jobs and the
Suppose you have three jobs waiting to be completed, and you must determine the sequence in which these jobs should be worked on. You calculated the critical ratio for each of the jobs and the
Jack, the owner of Jack's Electronic Repair, currently has five jobs to be scheduled:a. If Jack uses SPT to schedule these jobs, what will be the average job tardiness?b. If Jack uses EDD to schedule
Consider the following three jobs: Job Oscar requires 2 weeks of work and is due in 4 weeks. Job Lima requires 3 weeks of work and is due in 5 weeks. Job Denver requires 1 week of work and is due in
The operations manager of a body and paint shop has five cars to schedule for repair. He would like to minimize the time needed to compete all work on these cars. Each car requires body work prior to
Pristine Aircraft Maintenance has received four Boeing 737 airplanes that require maintenance. Airplane SW-023 will require 4 days of hull inspection and 3 days of painting, Airplane DL-040 will
The owner/operator of an in-home meal catering company has four jobs to deliver today, shown in the order in which they were received:a. Suppose the owner uses FCFS to schedule these jobs. How long,
The table below contains information about five jobs waiting to be processed at stamping machine 307 in the MetalBright Job Shop.a. Which of these three rules provides the best sequence in terms of
Bronson Construction must complete six road repair projects before winter weather ends the construction season. In each case, Bronson has been hired to remove an old road in a process known as
Gourmet Food Support (GFS) is a commercial caterer that prepares salads, soups, and baked goods, primarily for sale through other restaurant kitchens. The bakery area of GFS is equipped with one
Recall from Chapter 4 that Tiger Stripe Copy Center is a small business located near a large university campus. Tiger Stripe Copy offers a range of services to walk-in customers, including passport
A car rental agency uses 96 boxes of staples a year. The boxes cost \($4\) each. It costs \($10\) to order staples, and it costs \($0.80\) to hold a box of staples in inventory for 1 year. Using the
A gift shop sells 2,000 musical greeting cards each year. The ordering cost for musi- cal greeting cards is \($100\) per order and the holding cost is \($10\) per musical greet- ing card per year. If
Critical path methodology allows managers to focus on a group of tasks within a project. What is a potential disadvantage of this methodology?
How are projects and customized products related?
It is said that a delay in critical path activity will delay the project, while a delay in a noncritical path activity will not necessarily delay the project. Explain the need to specify not
Would a project with 100 tasks always be more challenging to manage than a differ- ent project with only 20 tasks? Why or why not?
What are the likely consequences to managing a highly uncertain project in the predictive style of project management?
Why does a project necessarily have to possess some form of deadline? What is the implication of a project without a deadline?
Is the critical path the shortest or longest path through a project network?
If task A is an immediate predecessor of task B, what must be true about the sched- uled timing of these two tasks?
What is the total amount of slack in all critical path activities?
PERT assumes that individual task times can be modeled with what type of prob- ability distribution?
PERT assumes that path lengths through a network can be modeled with what type of probability distribution?
When crashing a project, a manager generally focuses on which activities first?
A point of significance in the time line or history of a project is referred to as a what?
Which technique better reflects uncertainty in project management, PERT or CPM?
If the early start time of a critical path activity is 7, what is its late start time?
If the early start time of a task is 4 days and its early finish time is 6 days, how long is this task?
If tasks are always finished on their deadlines and never earlier, is this timing known as forward or backward scheduling?
If a noncritical path activity is crashed, what happens to the overall duration of the project?
Task C has two immediate predecessors, tasks A and B. Task A has an early finish time of 3 days, and task B has an early finish time of 5 days. What is the early start time of task C?
Task C has two immediate predecessors, tasks A and B. Task A has an early finish time of 3 days, and task B has an early finish time of 5 days. Task C is 2 days long. What is the early finish time of
Task C has two immediate followers, tasks D and E. Task D has a late start time of 10 days and task E has a late start time of 8 days. What is the late finish time of task C?
Task C has two immediate followers, tasks D and E. Task D has a late start time of 10 days and task E has a late start time of 8 days. Task C is 2 days long. What is the late start time of task C?
Task E has an early start time of 3 days and an early finish time of 5 days, while it also has a late start time of 10 days and a late finish time of 12 days from now. What is the slack in task E?
Task A has an optimistic time of 3 days, a mostly likely time of 4 days, and a pes- simistic time of 10 days. What are the expected time and the variance in task A?
A project consists of four tasks: A, B, C, and D. Task A must be completed before B and C are started, and task C must be completed before task D is started. How many paths are in this network?
A project consists of four tasks: A, B, C, and D. Task A must be completed before B and C are started, and task C must be completed before task D is started. Each task takes 1 day to complete. What
A project network has a total of four paths running through it. These four paths vary in length, from a minimum of 4 days long to a maximum of 18 days long. How long will this project take to
There are four activities on the critical path, and these activities have standard deviations of 1, 2, 4, and 2 days, respectively. What is the standard deviation of this critical path?
A project network has two paths running through it. The first path has an expected length of 10 days and a variance of 2 days. The second path has an expected length of 11 days and a variance of 1
A project network has two paths running through it. The first path has an expected length of 10 days and a variance of 2 days. The second path has an expected length of 11 days and a variance of 1
Path A-B-E has a 55% probability of being completed within 3 weeks. Path C-D-F has a 90% probability of being completed within 3 weeks. If these are the only two paths in a project network, what is
A certain office building must be renovated and then sold. Renovation of similar buildings has taken an average of 4 weeks, with a standard deviation of 1 week. Once placed on the market after
Consider the following project management problem:a. What is the expected completion time of this project?b. What is the critical path through this project? Task Immediate Predecessor(s) Duration
Consider the project information in the table below:Draw and analyze a project network diagram to answer the following questions:a. If you were to start on this project, which are the activities that
Consider the following project, which consists of 10 tasks:a. What is the critical path through this network? What is the completion time of this project?b. What is the slack in task F?c. Suppose the
Mega Mart Store is a discount department store badly in need of renovation. To avoid loss of sales and disruption of customer shopping habits, Mega Mart wants to complete this renovation without
Consider the following project network, with task duration data provided:Please answer the following questions, based on your analysis of this diagram.a. What is the critical path through this
Jersey Warehouse packs and ships customer orders for three large online retailers. Jersey Warehouse normally operates continuously, but is planning to shut down next week to replace its computer
The Schulz School of Business Administration (SSBA) is planning its annual commencement ceremony, to be held in the university's indoor arena. The university has granted SSBA use of this facility for
Convex Productions has just received a contract to film a commercial video that will air during a major sporting event in North America, and then be available on-demand through banner advertisements
Summerline Contracting has just been awarded the Dalvey Point Storm Water Upgrade Project, a major and time-sensitive contract worth sev- eral million dollars. The Dalvey Point area is a retail
How does a NIMBY argument potentially relate to the issues of productivity and sustainability?
Where is your college or university located and what factors best explain this? What types of factors are these?
What impact did introduction of the intermodal container to logistics have on loca- tion planning?
Costs incurred at a facility even when it is idle are called what?
What is the viewpoint of someone nicknamed a NIMBY?
What are costs that vary with volume of associated activity called?
Which does not support the flow of information between supply chain partners, intermodal containers or paper forms?
If goods are available under standard terms EXW is the buyer or seller responsible for the goods' clearing customs?
Would passenger airlines or a bicycle courier service be an example of a hub-and- spoke network?
Which is less accessible, air freight or maritime shipping networks?
Which logistical mode is most appropriate for a small shipment that must be some- where very fast and far away?

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