An assembly line is to operate 7 hours per day with a desired output of 750 units per day. Theassembly line tasks, times, and predecessors are shown in the table below.Task12345678Time (s)20720221510168a. Draw the precedence diagram.b. What is the workstation cycle time?c. What is the theoretical number of work stations?Predecessor122345,67d. Balance this line using sequential restrictions and the longest operating time rule.e. What is the efficiency of your balanced line?

HJere, first, I will draw the precedence diagram, each task is given the time data and the…

Answered: a. Draw the precedence diagram. b. What…

Practical Management Science

6th Edition

ISBN:9781337406659

Author:WINSTON, Wayne L.

Publisher:WINSTON, Wayne L.

Chapter2: Introduction To Spreadsheet Modeling

Section: Chapter Questions

Problem 20P: Julie James is opening a lemonade stand. She believes the fixed cost per week of running the stand...

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Illinois Furniture, Inc., produces all types of office furniture. The "Executive Secretary" is a chair that has been designed using ergonomics to provide comfort during long work hours. The chair sells for $130. There are 480 minutes available during the day, and the average daily demand has been 50 chairs. There are eight tasks: Task ABCDEFGH Performance Time (mins) 5 Were you able to assign all the tasks to the theoretical minimum number of workstations? A B C D E FL G 5675768 H Task Must Follow Task Listed Below a) The cycle time for the production of a chair = minutes (round your response to two decimal places). (round your response up to the next whole number). b) The theoretical minimum number of workstations = c) The assignment of tasks to workstations should be: (Hint: Number workstations sequentially in terms of precedence relationships and combine any applicable tasks.) Task A, B CDEE F, G Workstation Number Station 1 Station 6 d) For this process, the total idle time per…
Power Builders Inc. is planning for an upcoming job with a large client. They have listed the specific activities and steps to be performed, and estimated the time to complete each activity. The activities involved in the job are listed below: Activity Description of Activity Preceding Activity Estimated Time Required (in weeks) A B C D E F G H I J K Planning Meeting Obtain Permit Inspect Damage Begin Repair Work Order Additional Materials Apply for Waiver Obtain Waiver Complete Electrical Work Build Interior Partitions Onsite Testing Meet With Client -- A B A D E C, F D H G, I J 5 2 5 4 2 4 2 5 5 2 2 REQUIRED: Prepare a Gantt Chart from the facts in this time budget.
1. A production department of a textile firm received six different orders this week. They have calculated the processing time presented as a table (below). They have also put the due dates for each job. Job A с E B D F Process. Time 2 4 5 8 10 12 Due Date 7 4 15 16 17 18 Based on the table please provide four sequences to complete the jobs: a) Using first come first served (FCFS) assuming the letters represent the order they arrive (A first, B next, then C, etc..) b) Using shortest processing time c) Using longest processing time d) Using due dates Calculate "average completion time", "average number of jobs in the system" and "average job lateness" for all the sequences you have generated above.
Case: The Drop-In Visitor As the door closed behind her departing visitor, Jumanji Residential Supervisor Janet Mills glumly reflected that she had just lost an hour that she could ill afford to lose. She would either have to forego the schedule she was working on or be later for an upcoming meeting. The hour had been lost because of a visit from a pleasant but marginally aggressive sales representative trying to acquaint her with "the greatest little thing to come along". As was her practice, Janet consented to see the visitor although she resented the intrusion. This incident, occurring on a Friday, made Janet realize that she had lost time to four such drop-in visits this week alone. She did not like the idea of simply saying no or otherwise trying to avoid people who wanted to see her, but she was becoming more aware that her work was beginning to suffer because of such demands on her time. Questions: 1. Describe how stress can be both positive and negative.
Define work cell and the requirements of a work cell
Pvn
Table : Task time pizza assembly Task Description Roll Dough Add pizza source Sprinkle cheese A B с D E F G H Task time (sec) Preceding task 60 30 35 25 Add sausage Add Pepperoni 35 Add Mushrooms 22 Shrink-wrap pizza 15 Add label 23 A B с с с D,E,F G Total time 245 sec Table above shows the task time and precedence relationships for a pizza assembly. The product time per day is 8 hours and the production schedule requires 300 pizzas per day by the assembly time. 1. Draw the precedence diagram of the operation. 2. Determine the cycle time of the line. 3. Calculate the minimum number of workstations for this operation. 4. Construct the line layout of the operations following by rules below: 5. Longest task time rule. 6. Number of following rules. 7. Compute the resulting efficiency and balance of delay percentages. 8. If a worker is paid RM35 per day, compute the cost of idleness per week (assuming a work 6-day week).
Problem 7-4 (Algo) Given these observed times (in minutes) for four elements of a job, determine the observed time (OT) for each element. Note: The second element only occurs every other cycle. (Round your answers to 2 decimal places.) Element 1 2 3 4 1 4.8 - Element 1 2 3 4 3.8 3.3 2 4.3 2.8 3.8 4.3 CYCLE 3 4.8 Click here for the Excel Data File - 4.8 3.3 Observed Time 4 4.8 2.8 3.8 3.3 5 4.8 3.8 3.3 6 4.8 2.8 3.8 3.3
As part of a major plant renovation project, the industrial engineering department has been asked to balance a revised assembly operation to achieve an output of 230 units per 8-hour day. Task times and precedence relationships are as follows: Duration Immediate Task (minutes) Predecessor a 0.2 b 0.6 a 0.4 b d 0.7 e 1.6 f 1.8 e f Do each of the following: a. Determine the number of followers for each task. Number of tasks following task a Number of tasks following task b Number of tasks following task c Number of tasks following task d Number of tasks foll task e Number of tasks following task f Number of tasks following task g
What is the bottleneck time of the system?

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a. Draw the precedence diagram. b. What is the workstation cycle time? c. What is the theoretical number of work stations?