An assembly line consisting of three consecutive stations produces two radio models: HiFi-1 and HiFi-2. The following table provides the assembly times of the three workstations. Workstation 1 2 3 Minutes per unit HiFi1 6 5 4 HiFi-2 4 5 6 The daily maintenance for stations 1,2, and 3 consumes 10%, 14%, and 12%, respectively, of the maximum 480 minutes available for each station each day. Determine the optimal product mix that will minimize the idle (unused) times in the three workstations.
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- Knott's Berry Farm is contemplating buying a new van for its operations. The farm's engineering staff has researched the market and found 2 units that appear to meet their requirements. Truck # 1 has a cost of $37,000 and requires an annual maintenance cost of $2,700. At the end of its useful life (3 years), it is projected to have a salvage value of $5,000. On the other hand, Truck #2 has an initial cost of $40,000 and requires only $2,000 in annual operating costs because the manufacturer is claiming that some routine maintenance is covered in the price of the truck. Truck # 2 has an estimated salvage value of $8,000 at the end of its 4 year service life. The CEO has determined that the farm's MARR is 12%. The trucks are needed for 12 years according to the 2024 Strategic Plan. The Engineering Department has determined that no significant changes are needed in the future that would change prices and functional characteristics of each truck. As a member of the Engineering Department,…Hammond Inc. has analyzed the setup time on its computer-controlled lathe. The setup requires changing the type of fixture that holds a part. The average setup time has been 135 minutes, consisting of the following steps: Step Time (in minutes) Turn off machine and remove fixture from lathe 13 Go to tool room with fixture 15 Record replacement of fixture to tool room 18 Return to lathe 20 Clean lathe 17 Return to tool room 20 Record withdrawal of new fixture from tool room 12 Return to lathe 15 Install new fixture and turn on machine 8 Total setup time 138 Why should management be concerned about improving setup time? What do you recommend to Hammond Inc. for improving setup time? How much time would be required for a setup, using your suggestion in (b)?19-33 Waiting times, manufacturing cycle times. The IVplast Corporation uses an injection molding ma- chine to make a plastic product, Z39, after receiving firm orders from its customers. IVplast estimates that it will receive 40 orders for Z39 during the coming year. Each order of Z39 will take 120 hours of machine time. The annual machine capacity is 6,800 hours. 1. Calculate (a) the average amount of time that an order for Z39 will wait in line before it is processed and (b) the average manufacturing cycle time per order for Z39.
- A production process at Kenneth Day Manufacturing is shown in the figure below. The drilling operation occurs separately from, and simultaneously with, the sawing and sanding, which are independent sequential operations. A product needs to go through only one of the three assembly operations (the operations are in parallel). 7 units/hr 5 units/hr Assembly 0.8 units/hr Sawing Sanding Welding Assembly 2.1 units/hr 0.8 units/hr Drilling 2.5 units/hr Assembly 0.8 units/hr a) is the bottleneck. b) The bottleneck time is minutes per unit (round your response to two decimal places). c) The throughput time of the overall system is minutes (round your response to two decimal places).Jason Carter works for a producer of soaps that come inpackages of 6 each. His job is to fi ll the packages with soap, andhe is expected to process 30 packages an hour. Th e facility whereJason works uses a kanban production system in which eachcontainer holds 5 packages of soap. It takes 20 minutes to receivethe packages he needs from the previous workstation. How manykanbans are needed for the fi lling process?Up, Up, and Away is a producer of kites and wind socks.Relevant data on a bottleneck operation in the shop for theupcoming fiscal year are given in the following table:Item Kites Wind SocksDemand forecast 30,000 units/year 12,000 units/yearLot size 20 units 70 unitsStandard processing time 0.3 hour/unit 1.0 hour/unitStandard setup time 3.0 hours/lot 4.0 hours/lotThe shop works two shifts per day, 8 hours per shift, 200 daysper year. Currently, the company operates four machines,and desires a 25 percent capacity cushion. How many ma-chines should be purchased to meet the upcoming year’s de-mand without resorting to any short-term capacity solutions?
- The ClickClock corporation produces clocks with six stations. Each station is manned by a human worker, who do the following tasks: These workers get paid $ 10 an hour. Ignore any Station Task Sequence Processing Time (secs) Task Heat-stake lens to bezel Inspect bezel Clean switch holes Install set switch in bezel Total time for A Check switch travel Clean inside bezel Install module in bezel Total time for B Install battery clip in module Heat-stake battery clip in module Install two batteries in module Check switch 14 2 26 A 3 10 Preparation 1 4 18 68 23 B 6 12 Preparation 2 7 25 60 8 20 9 20 Battery 10 22 Installation 11 8. Total time for C 70 Install band Inspect band Total time for D Cosmetic inspection Final test D 12 45 Band 13 13 Installation 58 E 14 4 Packaging 15 71 Preparation Total time for E 75 Place watch and cuff in display box Place cover in display box base 16 20 17 14 Watch 18 Place owner's manual and box into tub 30 packaging Total time for F 64A production process at Kenneth Day Manufacturing is shown in the figure below. The drilling operation occurs separately from, and simultaneously with, the sawing and sanding, which are independent sequential operations. A product needs to go through only one of the three assembly operations (the operations are in parallel). 6 units/hr Sawing 2.5 units/hr Sanding Drilling 1.8 units/hr Welding 7 units/hr Assembly 0.7 units/hr Assembly 0.7 units/hr Assembly 0.7 units/hrIn a sandwich production factory, making each ham and cheese sandwich consists of a number of activities which totally take 7 minutes. The production line for ham and cheese sandwich has five workers who work 12 hours a day. What is the maximum number of ham and cheese sandwiches they canmake in this production line?a) 465 b) 425c) 612 d) 514e) 102
- Sawing 20 min/unit Sanding 20 min/unit Drilling 32 min/unit Welding 30 min/unit Assembly 93 min/unit Assembly 93 min/unit Assembly 93 min/unit A production process is shown in the figure above. The drilling operation occurs separately from, and simultaneously with the sawing and sanding operations. Welding starts when both drilling and sanding operations have been completed. After welding, a product needs to go through only one of the three assembly operations (the operations are in parallel, where parallel lines perform the exact same operation). Considering the process times at stations, what is the process time of the system (in min/unit)?(a) T. Smunt Manufacturing Corp. has the process displayed below. The drilling operation occurs separately from and simultaneously with the sawing and sanding operations. The product only needs to go through one of the three assembly operations (the assembly operations are "parallel"). ASSEMBLY SAWING SANDING 78 min/unit 15 min/unit 15 min/unit WELDING ASSEMBLY DRILLING 25 min/unit 78 min/unit 27 min/unit ASSEMBLY 78 min/unit 1. Which operation is the bottleneck? 2. What is the throughput time for the overall system? 3. If the firm operates 8 hours per day, 22 days per month, what is the monthly capacity of the manufacturing process? 4. Suppose that a second drilling machine is added, and it takes the same time as the original frilling machine. What is the new bottleneck time of the system? 5. Suppose that a second drilling machine is added, and it takes the same time as the original drilling machine. What is the new throughput time?Due to the COVID‐19 pandemic, Julio’s Pizzeria, traditionally a high‐class, eat‐in only Italian restaurant in Malibu, has had to pivot in order to stay in business. One of their most sought‐after menu items is their sausage, ham, and pepperoni pizza. To accommodate the anticipated increase in carry‐out and delivery orders of this famous entrée, the restaurant manager, Kerry, has decided to create a small assembly line to speed up production of the pizzas. All tasks required to produce the pizza have been identified along with the time it takes to perform the task and the immediate predecessors for each task. if Desired Cycle time = Total time per hour / Demand per hour Desired Cycle time = 60 (minutes/hour) * 60 (seconds/minute) / 40 Desired Cycle time = 90 seconds and task are assigned to each work station below: Workstation 1: A, B Workstation 2: C, D, E, F, G Workstation 3: H, I then What is the efficiency of the most balanced line?