To make sandwiches at a Subway, the staff should make use of both hands very quickly and efficiently. Make an operations chart involved in making a sandwich.
> Al-Arabi Manufacturing Company manufactures different types of knobs for doors in its manufacturing facility in 6th of October, Egypt. The company operates its production facility 250 days per year. The demand for the steel knobs is 25,000 units per year
> Race One Motors is an Indonesian car manufacturer. At its largest manufacturing facility, in Jakarta, the company produces subcomponents at a rate of 300 per day, and it uses these subcomponents at a rate of 12,500 per year (of 250 working days). Holding
> M. Cotteleer Electronics supplies microcomputer circuitry to a company that incorporates microprocessors into refrigerators and other home appliances. One of the components has an annual demand of 250 units, and this is constant throughout the year. Carr
> How is process layout applied to supermarkets layout? What are the advantages and disadvantages of this type of layout for customers?
> Abey Kuruvilla, of Parkside Plumbing, uses 1,200 of a certain spare part that costs $25 for each order, with an annual holding cost of $24. a) Calculate the total cost for order sizes of 25, 40, 50, 60, and 100. b) Identify the economic order quantity an
> Joe Henry’s machine shop uses 2,500 brackets during the course of a year. These brackets are purchased from a supplier 90 miles away. The following information is known about the brackets: a) Given the information, what would be the eco
> Thomas Kratzer is the purchasing manager for the headquarters of a large insurance company chain with a central inventory operation. Thomas’s fastest-moving inventory item has a demand of 6,000 units per year. The cost of each unit is $100, and the inven
> Atech Service sells professional cleaning machines and scouring agents. They deliver the scouring agents to customers on a fixed weekly schedule. The annual demand is 1,500 bottles, each with a value of $10. The fixed cost for each order placed at the su
> Lead time for one of your fastest-moving products is 21 days. Demand during this period averages 100 units per day. a) What would be an appropriate reorder point? b) How does your answer change if demand during lead time doubles? c) How does your answer
> South-eastern Bell stocks a certain switch connector at its central warehouse for supplying field service offices. The yearly demand for these connectors is 15,000 units. South-eastern estimates its annual holding cost for this item to be $25 per unit. T
> Matthew Liotine’s Dream Store sells beds and assorted supplies. His best-selling bed has an annual demand of 400 units. Ordering cost is $40; holding cost is $5 per unit per year. a) To minimize the total cost, how many units should be ordered each time
> The manager of a traffic and safety company wants to use the ABC classification system to classify its inventory items. The annual demand and the selling price of each item are listed in the table below. Develop an ABC classification for these 10 items a
> Consider a three-firm supply chain consisting of a retailer, manufacturer, and supplier. The retailer’s demand over an 8-week period was 100 units each of the first 2 weeks, 200 units each of the second 2 weeks, 300 units each of the th
> A manufacturer produces a single product that is sold abroad to an industrial company through the following channel. a) Calculate the bullwhip effect for each stage of the supply chain. b) What kind of actions can the management take to smooth the bullwh
> How does automatic identification work in a warehousing system?
> Over the past 5 weeks, demand for wine at Winston’s Winery has averaged 1,890 bottles, and the variance of demand has been 793,000 bottles. Winston has ordered an average of 1,900 bottles per week over that time period, with a variance of orders of 1,805
> Consider the supply chain illustrated here: Last year, the retailer’s weekly variance of demand was 200 units. The variance of orders was 500, 600, 750, and 1,350 units for the retailer, wholesaler, distributor, and manufacturer, respec
> Kryoneri Perfume Company is considering two alternatives for the supply of vetiver oil (an essential oil used in high-end perfumes). Alternative 1 is to use two suppliers located in Haiti, where half of the world’s vetiver oil comes from. Each has a “uni
> Johnson Chemicals is considering two options for its supplier portfolio. Option 1 uses two local suppliers. Each has a “unique-event” risk of 5%, and the probability of a “super event” that would disable both at the same time is estimated to be 1.5%. Opt
> Referring to Problem S11.2, Wellington Company re-estimated the probability of a “super-event” to 0.2% due to some heavy safety investment carried out in the Albuquerque plant. In addition, they replaced their second and third suppliers, for quality reas
> The food items listed in the following table are stored on a cruise ship for a 7-day cruise. Using the following figure, indicate the best storage location for each item to minimize average distance travelled.
> Amy Zeng, owner of Zeng’s Restaurant Distributions, supplies non-perishable goods to restaurants around the metro area. She stores all the goods in a storage area with a single dock and one aisle. The goods are divided into five categor
> Peter Bell of Bell Electronics maintains an extensive stock of computer components for the consumer market. He has hundreds of drawers/cabinets for the many small parts (mother boards, graphic cards, fans, etc.), and he wants to organize them so as to mi
> Following the incident of a furnace fire in the semiconductor plant in Albuquerque, New Mexico, Wellington Company decided to change its single-sourcing strategy of major components to multi-sourcing. The top management of Wellington Company believes tha
> Nubia textile shop in Egypt imports one of its products from China. The transportation time is currently 40 days, the cost per unit is E£35, and the holding cost of the product is 30% annually. Because of the long shipping time, the manager is evaluating
> Study the distribution of different sections and services across several floors in multi-storey department stores. Explain the rationale behind the location of different departments or sections in such stores.
> The Smoked Salmon, a seafood supplier in Egypt, has a new yearly contract to supply fresh seafood products to Saudi Arabia. The value of the contract is E£800,000 (Egyptian Pound) and the estimated holding cost is 20% annually. The Smoked Salmon is evalu
> If you have a third option for the data in Problem S11.16 and it costs only $4,000 and also takes 20 days, what is your most economical plan? Data from Problem S11.16: A company with a plant in Basel can be served by both rail and truck at a cost of €25
> A company with a plant in Basel can be served by both rail and truck at a cost of €250 and €1,500 per load, respectively. The transit time for the train is 15 days while that for the truck is 5 days. a) If the daily cost of transit inventory is €100, whi
> Sean Willems has evaluated the vendors in Table S11.3 as well as Fricker V-Tech, the vendor in Problem S11.13, but the Quality Control Manager says that new data suggest that Siemsen Systems, Inc.’s quality has deteriorated, and Siemsen
> Referring to Problem S11.12, Sean Willems, in addition to the two possible vendors evaluated in Table S11.3, has found a third possible vendor. He now wants to evaluate all three vendors using the weights in Table S11.3. He scores the third vendor, Frick
> The supply chain manager for Keskin Industries, Sean Willems, has developed the data shown in Table S11.3 for two vendors. Based on the weights and rankings shown, which is the preferred vendor?
> Using the data in Problem S11.10, assume that both Donna, Inc. and Kay Corp. are able to move all their “poor” ratings to “fair.” How would you then rank the two firms? Data from Pr
> As purchasing agent for Eynan Enterprises in Richmond, Virginia, you ask your buyer to provide you with a ranking of “excellent,” “good,” “fair,”
> How would you go about attempting to come up with the probability of a “super-event” or the probability of a “unique event?” What factors would you consider?
> The plant manager, Murat Kristal, at York Technologies makes Aircraft Navigation Systems. He expects you, as the new OM analyst, to provide some insight for performance of the plant. High on his list is an understanding of his inventory turnover based on
> What are the key factors that should be considered when designing a hospital layout?
> A company has supplied the following data with respect to its three different types of fertilizers: Calculate (assuming 50 sales weeks annually): a) The inventory turnover and weeks of supply for each fertilizer. b) The average inventory turnover and ave
> An excerpt from Kalamia manufacturing company’s last year’s final annual report revealed the following information: Compute: a) inventory turnover; b) weeks of supply, assuming an annual operation of 50 weeks and the c
> A company buys an item for €50 and sells it for €75. The annual sales and average stock of this item are 10,000 units and 1,600 units, respectively, while the carrying cost is 20% of its acquisition cost. Calculate: a) inventory turnover b) weeks of supp
> The financial analysis of a manufacturing company for the previous year has provided, among others, the following details: Net revenue: €50,000 Cost of goods sold: €26,000 Value on hand: ◆ Raw material: €1,500 ◆ Work-in-process: €1,200 ◆ Finished goods:
> Based on the data in Table 11.10 determine: a) How many weeks of finished goods were on hand at the end of last year. b) How many weeks of finished goods were on hand at the end of this year.
> Based on the data in Table 11.10, you have been asked to determine: a) The company’s percentage of assets committed to inventory last year. b) The company’s percentage of assets committed to inventory this year. c) The
> Choose a local establishment that is a member of a relatively large chain. From interviews with workers and information from the Internet, identify the elements of the supply chain. Determine whether the supply chain supports a low-cost, rapid response,
> Draw a process chart for the activities of a receptionist handling the check-in process at a hotel.
> Prepare a process chart for the Jackman in Solved Problem 10.1. Data from Problem 10.1: Rate a job you have had using Hackman and Oldham’s core job characteristics on a scale from 1 to 10. What is your total score? What about the job could have been cha
> Using the data in Solved Problem 10.1, prepare an activity chart like the one in the Solved Problem, but a second Gas Man also delivers 11 gallons. Data from Problem 10.1: Rate a job you have had using Hackman and Oldham’s core job characteristics on a
> Review the location of shops and services in your local shopping centre. Can you find examples of clustering in the retail sector?
> Develop a process chart for installing a new memory board in your personal computer.
> A time study has revealed an average observed time of 5 minutes, with a standard deviation of 1.25 minutes. These figures are based on a sample of 75 cycles. Is this sample large enough for analyst Anand Paul to be 99.73% confident that the standard time
> Arunachalam Narayanan has been clocked performing three work elements in the office, with the results shown in the following table. The allowance for tasks such as this is 15%. a) Find the normal time. b) Find the standard time
> The data in the following table represent time-study observations for an assembly process at Nagesh Murthy’s Toy Factory. On the basis of these observations, find the normal time for each element and the standard time for the process. A
> The cycle time for performing a certain task has been clocked at 10 minutes. The performance rating of Richard Muszynski III was estimated at 110%. Common practice in this department is to allow 5 minutes of personal time and 3 minutes of fatigue time pe
> Draw an activity chart for a concert (for example, Tim McGraw, Linkin Park, Lil’ Wayne, or Bruce Springsteen) and determine how to put together the concert so the star has reasonable breaks. For instance, at what point is there an instrumental number, a
> An assembly-line worker at Joseph Milner’s Fabrication Shop inserts Part A into Part B. A time study was conducted and produced the following results in seconds: 8.4, 8.6, 8.3, 8.5, 8.7, 8.5. What is the average cycle time?
> Supervisor Tom Choi at Tempe Equipment Company is concerned that material is not arriving as promptly as needed at work cells. A new kanban system has been installed, but there seems to be some delay in getting the material moved to the work cells so tha
> Sharpening your pencil is an operation that may be divided into eight small elemental motions. In MTM terms, each element may be assigned a certain number of TMUs: What is the total normal time for sharpening one pencil? Convert your answer into minutes
> Jaguar Land Rover opened its first plant in China in 2014. Discuss the main reasons behind this decision.
> Darden Restaurants, owner of popular brands such as Olive Garden, Bahama Breeze, and Longhorn Grill, serves more than 320 million meals annually in more than 1,500 restaurants across the U.S. and Canada. To achieve competitive advantage via its supply ch
> A total of 300 observations of Bob Ramos, an assembly-line worker, were made over a 40-hour workweek. The sample also showed that Bob was busy working (assembling the parts) during 250 observations. a) Find the percentage of time Bob was working. b) If y
> A random work sample of operators taken over a 160-hour work month at Tele-Marketing, Inc., has produced the following results. What is the percentage of time spent working?
> A typical engineer at a mobile phone insurance company can fix 12 mobiles per day (based on the current demand level). If he works for nine hours a day, how much time does he have to fix each mobile? If the engineers are given 20% allowance (personal, fa
> Supervisor Kenneth Peterson wants to determine the percentage of time a machine in his area is idle. He decides to use work sampling, and his initial estimate is that the machine is idle 20% of the time. How many observations should Peterson take to be 9
> Bank manager Art Hill wants to determine the percentage of time that tellers are working and idle. He decides to use work sampling, and his initial estimate is that the tellers are idle 15% of the time. How many observations should Hill take to be 95.45%
> The process of replacing an old tire for customers at Tire Tech.company involves five work elements. The table below shows the results of a time study of the process performed by the manager on seven occasions. a) What is the standard time for the proces
> Draw a process chart for receiving an order for a coffee, making the coffee, and handing it to the customer in a café.
> The Dubuque Cement Company packs 80-pound bags of concrete mix. Time-study data for the filling activity are shown in the following table. Because of the high physical demands of the job, the company’s policy is a 23% allowance for work
> Based on a careful work study in the Hofstetter Corp., the results shown in the following table have been observed: a) Compute the normal time for each work element. b) If the allowance for this type of work is 15%, what is the standard time? c) How many
> A time study of a factory worker has revealed an average observed time of 3.20 minutes, with a standard deviation of 1.28 minutes. These figures were based on a sample of 45 observations. Is this sample adequate in size for the firm to be 99% confident t
> Why have many manufacturing facilities relocated from Western Europe to Asia? Discuss the motives and risks.
> Each year, Lord & Taylor, Ltd., sets up a gift-wrapping station to assist its customers with holiday shopping. Preliminary observations of one worker at the station produced the following sample time (in minutes per package): 3.5, 3.2, 4.1, 3.6, 3.9. Bas
> Peter Rourke, a loan processor at Wentworth Bank, has been timed performing four work elements, with the results shown in the following table. The allowances for tasks such as this are personal, 7%; fatigue, 10%; and delay, 3%. a) What is the normal time
> The results of a time study to perform a quality control test are shown in the following table. On the basis of these observations, determine the normal and standard time for the test, assuming a 23% allowance factor.
> A pizza shop in Dubai wants to estimate the standard time for preparing its famous margarita pizza. The manager has performed a time study of the process and the following results have been observed. What is the standard time for the process, if the shop
> A hotel housekeeper, Alison Harvey, was observed five times on each of four task elements, as shown in the following table. On the basis of these observations, find the standard time for the process. Assume a 10% allowance factor.
> Susan Cottenden clocked the observed time for welding a part onto truck doors at 5.3 minutes. The performance rating of the worker timed was estimated at 105%. Find the normal time for this operation. Note: According to the local union contract, each wel
> After training, Mary Fernandez, a computer technician, had an average observed time for memory-chip tests of 12 seconds. Mary’s performance rating is 100%. The firm has a personal fatigue and delay allowance of 15%. a) Find the normal time for this proce
> Make a process chart for changing the right rear tire on an automobile.
> Jell Lee Beans is famous for its boxed candies, which are sold primarily to businesses. One operator had the following observed times for gift wrapping in minutes: 2.2, 2.6, 2.3, 2.5, 2.4. The operator has a performance rating of 105% and an allowance fa
> After being observed many times, Beverly Demarr, a hospital lab analyst, had an average observed time for blood tests of 12 minutes. Beverly’s performance rating is 105%. The hospital has a personal, fatigue, and delay allowance of 16%. a) Find the norma
> Asda, a leading supermarket in the U.K., is taking its click-and-collect service (where customers can order online and collect their items from the collection points) to train stations across London for the first time as part of a wider charge to expand
> A Northeast Airlines gate agent, Chip Gilliken, gives out seat assignments to ticketed passengers. He takes an average of 50 seconds per passenger and is rated 110% in performance. How long should a typical agent be expected to take to make seat assignme
> Claudine Soosay recorded the following times assembling a watch. Determine (a) the average time, (b) the normal time, and (c) the standard time taken by her, using a performance rating of 95% and a personal allowance of 8%.
> Refer to Problem 10.13. a) If the allowance factor is 15%, what is the standard time for this operation? b) If the allowance factor is 18% and the performance rating is now 90%, what is the standard time for this operation? Data from Problem 10.13: If C
> If Charlene, the worker in Problem 10.13, has a performance rating of 90%, what is the normal time for the operation? Is she faster or slower than normal? Data from Problem 10.13: If Charlene Brewster has times of 8.4, 8.6, 8.3, 8.5, 8.7, and 8.5 and a
> If Charlene Brewster has times of 8.4, 8.6, 8.3, 8.5, 8.7, and 8.5 and a performance rating of 110%, what is the normal time for this operation? Is she faster or slower than normal?
> Design a process chart for printing a short document on a laser printer at an office. Unknown to you, the printer in the hallway is out of paper. The paper is located in a supply room at the other end of the hall. You wish to make five stapled copies of
> Encouraging people to separate their household waste into recyclable and non-recyclable bins and collecting these bins has been a big task for many local authorities. In the collection process, the bin lorry collects two types of bins from each house. Th
> Draw an activity chart for washing the dishes in a double-sided sink. Two people participate, one washing, the other rinsing and drying. The rinser dries a batch of dishes from the drip rack as the washer fills the right sink with clean but unrinsed dish
> Rate a job you have had using Hackman and Oldham’s core job characteristics on a scale from 1 to 10. What is your total score? What about the job could have been changed to make you give it a higher score?
> Reid Chocolates has yet another layout it wishes to consider. Layout 5, which follows, has what total trip distance?
> Distribution centres have a key role in ensuring quick home delivery of products in online sales. What techniques can be employed by retailers to select the best locations for their distribution centres?
> The National Library of China consists of four major sections, each occupying different floors of a seven-storey building. A study shows that the average total distance covered by visitors per day among different sections of the library is around 1,500 k
> A job shop in the new industrial area of Six of October, Egypt, wants to arrange four work centers to minimize the interdepartmental material-handling cost. The flow and the current layout are shown below. a) What is the “load * distanc
> Marilyn Hart, operations manager at Hart Electronics, faces assembly-line balancing problems. She has been told that the firm needs to complete 1,400 electronic relays per day. There are 420 minutes of productive time in each working day (which is equiva
> Given the following task, times, and sequence, develop a balanced line capable of operating with a 10-minute cycle time at Dave Visser’s company. a) Draw the precedence diagram. b) Assign tasks to the minimum feasible number of workstat
> An assembly plant for the Blood Pressure RX, a portable blood pressure device, has 400 minutes available daily in the plant for the device, and the average demand is 80 units per day Final assembly requires 6 separate tasks. Information concerning these
> The process of renewing a driver’s license at the traffic department in Egypt involves the following seven activities. These activities are currently performed in order and there are seven workers on duty. a) Develop a layout for the cu
> A manufacturing firm in Saudi Arabia has four work centres arranged in the following order: Plan A (Existing Layout). The number of work pieces moved between the four work centres are shown in the table below. The cost to move 1 work piece for 1 meter is
> Ten basic tasks must be performed on an assembly line to manufacture a product. The demand for the product is 60 units per day and the line is available 8 hours per day. The time to perform each task and the immediate predecessors are shown below: a) Dra
