What cycle time is required to satisfy the required output? What is the theoretical minimum number of stations
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A company is setting up an assembly line to produce 90 units per hour. The table below identifies the work elements, times, and immediate predecessors.
|
Work Element |
Time (Sec.) |
Immediate Predecessor(s) |
|
A |
25 |
- |
|
B |
18 |
A |
|
C |
20 |
A |
|
D |
5 |
B, C |
|
E |
12 |
C |
|
F |
8 |
E |
|
G |
16 |
D, F |
|
H |
12 |
G |
- What cycle time is required to satisfy the required output?
- What is the theoretical minimum number of stations?
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- Francis Johnson’s plant needs to design an efficient assembly line to make a new product. The assembly line needs to produce 15 units per hour, and there is room for only four workstations. The tasks and the order in which they must be performed are shown in the following table. Tasks cannot be split, and it would be too expensive to duplicate any task. TASK TASK TIME (MINUTES) IMMEDIATE PREDECESSOR A 1 — B 2 — C 3 — D 1 A, B, C E 3 C F 2 E G 3 E What is the workstation cycle time required to produce 15 units per hour? Note: Round your answer to 1 decimal place. Balance the line to use the fewest possible workstations to meet the cycle time found in part (b). Use whatever method you feel is appropriate. What is the efficiency of your line balance, assuming the line operates at the cycle time from part (b)? Note: Round your answer to 1 decimal place.The desired daily output for an assembly line is 360 units. This assembly line will operate 450 minutes per day. The following table contains information on this product’s task times and precedence relationships: TASK TASK TIME (SECONDS) IMMEDIATE PREDECESSOR A 30 — B 35 A C 30 A D 35 B E 15 C F 65 C G 40 E, F H 25 D, G What is the required workstation cycle time to meet the desired output rate? Balance this line using the largest number of following tasks. Use the longest task time as a secondary criterion. Note: Leave no cells blank - be certain to enter "0" wherever required.An assembly line is to operate eight hours per day with a desired output of 200 units per day. The following table contains information on this product’s task times and precedence relationships: TASK TASK TIME(SECONDS) IMMEDIATEPREDECESSOR A 60 — B 60 A C 50 A D 70 A E 30 B, C F 110 C, D G 70 E, F H 70 G b. What is the required workstation cycle time to meet the desired output rate? (Round your answer to the nearest whole number.) c. Balance this line using the longest task time. (Leave no cells blank - be certain to enter "0" wherever required.) d. What is the efficiency of your line balance, assuming it is running at the cycle time determined in part b? (Round your answer to 1 decimal place.)
- An assembly line is to operate eight hours per day with a desired output of 240 units perday. The following table contains information on this product’s task times and precedencerelationships: Task Task Time (Seconds) Immediate Predecessor A 60 — B 80 A C 20 A D 50 A E 90…An assembly line is to operate eight hours per day with a desired output of 250 units per day. The following table contains information on this product’s task times and precedence relationships: TASK TASK TIME (SECONDS) IMMEDIATE PREDECESSOR A 50 — B 20 A C 25 A D 35 A E 60 B, C F 60 C, D G 50 E, F H 90 G What is the required workstation cycle time to meet the desired output rate? Note: Round your answer to the nearest whole number. Balance this line using the longest task time. Note: Leave no cells blank - be certain to enter "0" wherever required. What is the efficiency of your line balance, assuming it is running at the cycle time determined in part b? Note: Round your answer to 1 decimal place.The desired daily ouput for an assembly line is 420 units. This assembly line will operate 595 minutes per day. The following table contains information on the products task times and precedence relationships Task. Task time-seconds Immediate predecessor A. 35 - B. 40 A C 30 A D 40 B E 20 C F 70 C G 45 E-F H 30 D-G The required workstation cycle time to meet the desired output time is 85 seconds Balance this line using the largest number of following tasks. Use the longest task time as a secondary criterion The answer gives only 4 workstations as option Have to fill out following Workstation. Task Idle time 1 ?? ?? 2 ?? ?? 3…
- 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 tasks is given in the following table. Task Performance Time (minutes) Task Must Follow Task Listed Below A 4 - B 1 - C 1 A, B D 3 C E 4 D F 2 E b) Given the demand, what is the cycle time for this operation? The cycle time for this operation is enter your response here minutes/unit (enter your response as a whole number). c) What is the theoretical minimum number of workstations? The theoretical minimum number of workstations is enter your response here stations (enter your response as a whole number and, if your unrounded answer includes decimal values,…Klassen Toy Company, Inc., assembles two parts(parts I and 2): Part I is first processed at workstation A for15 minutes per unit and then processed at workstation B for330 PART 2 DESIGNING OPERATIONS10 minutes per unit. Part 2 is simultaneously processed at workstationC for 20 minutes per unit. Workstations B and C feed theparts to an assembler at workstation D, where the two parts areassembled. The time at workstation Dis 15 minutes.a) What is the bottleneck of this process?b) What is the hourly capacity of the process?Sue Helms Appliances wants to establish an assem-bly line to manufacture its new product, the Micro Popcorn Popper. The goal is to produce five poppers per hour. The tasks,task times, and immediate predecessors for producing one MicroPopcorn Popper are as follows:TASK TIME (min) IMMEDIATEPREDECESSORSA 10 —B 12 AC 8 A, BD 6 B, CE 6 CF 6 D, Ea) What is the theoretical minimum for the smallest number ofworkstations that Helms can achieve in this assembly line?b) Graph the assembly line, and assign workers to workstations.Can you assign them with the theoretical minimum?c) What is the efficiency of your assignment?
- A company needs to rebalance a product layout for producing new plastic license plates. They plan to use the assembly line six hours in order to meet projected demand of 2,160 license plates each day. The following table describes the tasks involved in the production of this product: Without regard to projected demand, what is the maximum possible cycle time for this assembly line? Task Time (secs) Immediate Predecessor a 3 none b 4 none c 5 a,b d 7 none e 9 c,dUse the longest work element rule to balance the assembly line described in the following table and Figure so that it will produce 40 units per hour.a. What is the cycle time?b. What is the theoretical minimum number of workstations?c. Which work elements are assigned to each workstation?d. What are the resulting efficiency and balance delay percentages?e. Use the shortest work element rule to balance the assembly line. Do you note any changes in solution? Work Element Time (Sec) Immediate Predecessor(s) A B C D E F G H I J K 40 80 30 25 20 15 60 45 10 75 15 None A A B C B B D E,G F H,I,JAlocal toy manufacturer is using a production line that runs 8 hours per day and produces a toy that requires a total of 7 tasks to be performed. The daily demand is 100 toys. Times of the tasks are 2.73, 2.01 201 2.13, 2.0, 2.61, 2.71 , and 2.95 minutes for A,B,C,D,E,F, and respectively. However, due to the nature of the product there are precedence rules that must be observed. Such that Task Adoes not need any predecessorsB requires task A to completed. To start task C and task Deach require task B to be completed. Task C must be completed prior to stating task E. Task F needs both task D and task Eto be completed. Finally, task G can start only once task Fis completed.Given we apply the most remaining tasks rule for balancing the assembly line with ties broken according to longest task time firstthe tasks that will be assigned to the SECOND workstation are
