When it comes to facilities planning, engineers turn to this book to explore the most current practices. The new edition continues to guide them. Get this from a library! Facilities planning. [James A Tompkins;]. Tompkins/White/Bozer/Tanchoco is the leading facilities planning book on the market, today. Its blending of breadth and depth of coverage are unmatched.
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Manual, the authors request that you bring it to the attention of Dr. James A. Tompkins, who was coordinating author for this edition of Facilities Planning. [P.D.F] Facilities Planning 4E [Ebook, EPUB, site] By James A. Tompkins Book Details. Author: James A. Tompkins. Pages: pages. bestthing.info: Facilities Planning () by James A. Tompkins; John A. White; Yavuz A. Bozer; J. M. A. Tanchoco and a great selection of similar .
Shown below is the matrix of net profit resulting from combinations of Q and x.
Shown below are the expected profits and probabilities of losing money for various batch sizes. The optimum batch size is 7, with a 0. Shown below is the matrix of net profits resulting from various combinations of Q and x.
Shown below are the expected profits and probabilities of losing money for various values of Q, the batch size. From the results obtained, the optimum batch size is The probability of losing money, which is the probability of less than 25 die cast parts being acceptable, equals 0. Also shown below is a matrix of net profits resulting from the combination of Q and x.
Developing Alternatives : Concepts and Techniques
Finally, the expected profit is shown for various values of Q. Without other constraints the optimum number of machines to assign to an operator was shown to equal 2. Hence, two groups of 2 would be less costly, on a cost per part produced basis, than one group of 4 machines.
Here, 11 machines are required to meet the production requirements. How should they be assigned?
One of the alternatives being considered is to assign 2 machines to each of 4 operators and then assign 3 machines to one operator; the alternative assignment being considered is to assign 2 machines to each of 5 operators and then assign 1 machine to one operator. Answers to Problems at the End of Chapter 2 To calculate the cost per unit produced for each scenario, it is useful to evaluate each alternative using a length of time equal to the least common multiple of the cycle times for each machine-operator assignment in the scenario.
During a period of 72 mins each 2-machine combination will perform 9 cycles and produce 18 parts; likewise, over the same time period, the 3machine assignment will perform 8 cycles and produce 24 parts. Hence, over a 72 min. The total cost per unit produced over a 72 min. During an 8 min.
The total cost per unit produced over an 8 min. Are there other scenarios that are less costly than the two considered? From Example 2. Hence, any scenario involving multiple assignments of single machines will be more costly than assignments of 2 machines per operator.
Likewise, from the analysis performed above, any scenario involving a 3-machine assignment will be more expensive than one with a 2-machine and a 1-machine assignment.
Further, any scenario having a 4machine assignment will be more costly than one that substitutes two 2-machine assignments for the 4-machine assignment. By similar analyses, there are no other scenarios that need to be considered for the assignment of 11 machines.
For the optimum assignment in Example 2. Recall, in Example 2. In steady state conditions, the repeating cycle is 9 minutes. Hence, in steady state conditions a total of units are produced. If replacement labor is provided to keep the machines working during the entire 8-hour shift and 3 shifts operate per day, then steady state production will result in units being produced per 8-hour shift.
This situation is illustrated in the following multiple activity charts. Also, it is assumed that a machine is dedicated to producing either product 1 or product 2 and cannot be assigned to produce a combination of the two products due to changeover times. Hence, it appears that 2 machines should be assigned to produce product 1 and 2 machines should be assigned to produce product 2; however, that leaves 1 machine unassigned.
From the solution to Problem 2. The alternatives to be evaluated are as follows: assign 2 machines producing product 1 to an operator and 3 machines producing product 2 to an operator; assign 2 machines producing product 1 to an operator, 2 machines producing product 2 to an operator, and 1 machine producing product 2 to an operator; assign 2 machines producing product 1 to an operator, 1 machine producing product 1 to an operator, and 2 machines producing product 2 to an operator.
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Assign 2 machines producing product 1 to an operator and 3 machines producing product 2 to an operator. The repeating cycle is 3 2. Hence, in 24 minutes, the 2 machines producing product 1 perform 3 repeating cycles and produce 6 parts, and 6 parts are produced by the 3 machines making product 2 while performing 2 repeating cycles. Assign 2 machines producing product 1 to an operator, 2 machines producing product 2 to an operator, and 1 machine producing product 2 to an operator.
ISBN 13: 9780471413899
The repeating cycle for product 2 is Hence, in minutes there will be 21 repeating cycles for machines producing product 1 and 16 repeating cycles of machines producing product 2. Assign 2 machines producing product 1 to an operator, 1 machine producing product 1 to an operator, and 2 machines producing product 2 to an operator.
As in the previous case, the repeating cycles are 8 and Hence, over a minute time frame, there will be 21 repeating cycles of the 3 machines producing product 1 and 16 repeating cycles of the 2 machines producing product 2. Compare all 6 new copies.
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James A. Tompkins; John A. White; Yavuz A. Bozer; J. Facilities Planning.
Tompkins ; John A. White ; Yavuz A. Bozer ; J. Wiley , This specific ISBN edition is currently not available.The major benefit of using a sprinkler system is that it is a very effective means of extinguishing or controlling a fire in its early stages and it can provide protection when the building is not occupied.
Given the flow and cost data, we have: However, the response should look something like the following.
Assign 2 machines producing product 1 to an operator, 1 machine producing product 1 to an operator, and 2 machines producing product 2 to an operator. As shown, the operator will have 1 minute of idle time during a repeating cycle, machine A will have 3 minutes of idle time, machine B will have 1. Case Material handling system Personnel required to operate the stadium Information systems required to operate the stadium Equipment needed to support the stadium.
An Explanation of the Art of Flying: Citations are based on reference standards.