OPERATIONS MANAGEMENT (LL) W/CONNECT
14th Edition
ISBN: 9781265502942
Author: Stevenson
Publisher: MCG CUSTOM
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Textbook Question
Chapter 6, Problem 4P
A producer of inkjet printer is planning to add a new line of printers, and you have been asked to balance the process, given the following task time and precedence relationship. Assume that cycle time is to be the minimum possible.
a. Do each of the following:
(1) Draw the precedence diagram.
(2) Assign tasks to stations in order of most following tasks. Tiebreaker, greatest positional weight.
(3) Determine the percentage of idle time.
(4) Compute the late of output in printers per day that could be expected for that line assuming a 420-minute working day.
b. Answer these questions:
(1) What it the shortest cycle tone that will permit use of only two workstations? Is this cycle time feasible? Identify the tasks you would assign to each station.
(2) Determine the percentage of idle time that would results if two stations were used.
(3) What is the daily output under this arrangement?
(4) Determine the output rate that would be associated with the maximum cycle time.
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Given the following information, assign tasks to work stations using the most followers rule. Assume the cycle time is 60
seconds. Submit for each workstation (1,2,3 etc.), the tasks assigned in order of assignment, the idle time for each work station
and the total idle time. (It will help for you to make the diagram but you are not required to submit the diagram)
Immediate
Task
Task Time (seconds)
Predecessor
35
50
A.
20
10
25
F\
C.E
40
Edit
Format Table
Paragraph V
BIUA
12pt v
Immediate Predecessor
Task Time (seconds)
Task
A local toy manufacturer is using a production line that runs 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, 201 01, 2.13, 2.0, 2.61 2.71. and 2.95 minutes for A, BC, D , and G, respectively. However, due to the nature of the product there are precedence rules that must be observed. Such that Task A does not need any predecessors; task B requires task A to be completed. To start task and task each require task B to be completed. Task must be completed prior to stating task E. Task F needs both task Dand task E to be completed. Finally, task G can start only once task Fis completed . What should be the calculated cycle time in minutes?
5. Flo's Quick-Lube performs fast oil changes (A) and checks for tire pressure and wear (B) and
brakes and alignment (C) according to the process flow indicated by the diagram below. Each
incoming car is put on a jack while one technician performs task A and another simultaneously
performs task B and a third performs task C (which must follow task B due to the limited space
under the vehicle on the jack). The server for task A takes on average 3 minutes to process a job,
the server for task B takes on average 2 minutes to process a job, and the server for task C takes
on average 2 minutes to process a job. Server A can be operated in parallel with Servers B and C.
All processing times are random and exponentially distributed, and jobs are allowed to queue in
front of each server. (You can assume that the number of jacks is sufficient to allow any length of
queue.)
(a)
AND
B
A
C
Figure 1: Flo's Process Flow
What is the capacity of the process (in orders/minute)?
Chapter 6 Solutions
OPERATIONS MANAGEMENT (LL) W/CONNECT
Ch. 6.2 - MORTON SALT Introduction Morton Salt is a...Ch. 6.2 - MORTON SALT Introduction Morton Salt is a...Ch. 6.2 - MORTON SALT Introduction Morton Salt is a...Ch. 6.2 - MORTON SALT Introduction Morton Salt is a...Ch. 6.2 - MORTON SALT Introduction Morton Salt is a...Ch. 6.2 - MORTON SALT Introduction Morton Salt is a...Ch. 6.3 - FOXCONN SHIFTS ITS FOCUS TO AUTOMATION Foxconn...Ch. 6.3 - FOXCONN SHIFTS ITS FOCUS TO AUTOMATION Foxconn...Ch. 6.3 - Prob. 2.1RQCh. 6.3 - Prob. 2.2RQ
Ch. 6.3 - Prob. 3.1RQCh. 6.3 - Prob. 3.2RQCh. 6.5 - Prob. 1.1RQCh. 6.5 - Prob. 1.2RQCh. 6 - Explain the importance of process selection in...Ch. 6 - Briefly describe the five process types, and...Ch. 6 - Prob. 3DRQCh. 6 - Briefly describe computer-assisted approaches to...Ch. 6 - What is a flexible manufacturing system, and under...Ch. 6 - Prob. 6DRQCh. 6 - Why might the choice of equipment that provides...Ch. 6 - Prob. 8DRQCh. 6 - Prob. 9DRQCh. 6 - Briefly describe the two main layout types.Ch. 6 - Prob. 11DRQCh. 6 - Prob. 12DRQCh. 6 - What is the goal of Line balancing? What happens...Ch. 6 - Why are routing and scheduling continual problems...Ch. 6 - Prob. 15DRQCh. 6 - Prob. 16DRQCh. 6 - The City Transportation Planning Committee must...Ch. 6 - Identify the fixed-path and variable-path...Ch. 6 - Prob. 19DRQCh. 6 - Prob. 20DRQCh. 6 - Prob. 21DRQCh. 6 - Prob. 22DRQCh. 6 - What is cellular manufacturing? What are its main...Ch. 6 - Prob. 24DRQCh. 6 - Prob. 25DRQCh. 6 - Prob. 1TSCh. 6 - What trade-offs are involved when deciding how...Ch. 6 - Who needs to be involved in process selection?Ch. 6 - Prob. 4TSCh. 6 - Prob. 5TSCh. 6 - Prob. 1CTECh. 6 - Prob. 2CTECh. 6 - What are the risks of automating a production...Ch. 6 - Consider an assembly line such as the burrito...Ch. 6 - Prob. 1PCh. 6 - A manager wants to assign tasks to workstations as...Ch. 6 - A manager wants to assign tasks to workstations as...Ch. 6 - A producer of inkjet printer is planning to add a...Ch. 6 - As part of a major plant renovation project, the...Ch. 6 - Twelve tasks, with times and precedence...Ch. 6 - For the given set of tasks, do the following: a....Ch. 6 - A shop works a 400-minute day. The manager of the...Ch. 6 - Arrange six departments into a 2 3 grid so that...Ch. 6 - Using the information given in the preceding...Ch. 6 - Using the information in the following grid,...Ch. 6 - Arrange the eight departments shown in the...Ch. 6 - Arrange the departments so they satisfy the...Ch. 6 - a. Determine the placement of departments fix a...Ch. 6 - Prob. 15PCh. 6 - Develop a process layout that will minimize the...Ch. 6 - Prob. 17PCh. 6 - Rebalance the assembly line in Problem 7. This...
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