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Problem 8: The ACE Machine Company is considering using a prority scheduling rule in its fabrication shop and must decide whether to use: the critical ratio rule, the order slack rule, the shortest operation next rule, or the slack per operation rule. The following table shows the company's current inventory and shop status. Order Number Manufacturing Lead Time Remaining Time Remaining Until Due Date Current Operation Processing Time Total Number of Processing Operations Remaining Time Remaining 1 15 7 2 3 8 2 15 11 3 4 3 20 -2 5 2 8 4 15 -5 4 3 8 5 15 3 1 12 8 Note Time i and the length of tim a) State the formula for calculating the priority index for each of sequencing rules given previously. b) Compute the scheduling priority for each order, four sequencing rules.

Problem 8: The ACE Machine Company is considering using a prority scheduling rule in its fabrication shop and must decide whether to use: the critical ratio rule, the order slack rule, the shortest operation next rule, or the slack per operation rule. The following table shows the company's current inventory and shop status. Order Number Manufacturing Lead Time Remaining Time Remaining Until Due Date Current Operation Processing Time Total Number of Processing Operations Remaining Time Remaining 1 15 7 2 3 8 2 15 11 3 4 3 20 -2 5 2 8 4 15 -5 4 3 8 5 15 3 1 12 8 Note Time i and the length of tim a) State the formula for calculating the priority index for each of sequencing rules given previously. b) Compute the scheduling priority for each order, four sequencing rules.

Practical Management Science
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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a) Critical Ratio = Order Slack = Shortest Operation next = Slack per Operation = b) Priority Index Calculations: Rule Critical Ratio Order Slack Shortest Operation Slack per Operation Resulting Priority Sequences: Rule Critical Ratio Order Slack Shortest Operation Hint: It is convenient to enter the data in a table, before doing the calculations Problem 8: The ACE Machine Company is considering using a prority scheduling rule in its fabrication shop and must decide whether to use: the critical ratio rule, the order slack rule, the shortest operation next rule, or the slack per operation rule. The following table shows the company's current inventory and shop status. Order # Manufacturing Lead Time Remaining Time Remaining Until Due 1 2 Order 3 Date Current Operation Processing Time # of Operations Remaining Total Processing Time Remaining Manufacturing Order Number Lead Time Remaining Time Remaining Until Due Date Current Operation Processing Time Number of Operations Remaining Total Processing Time Remaining 1 15 7 2 3 8 4 5 1 15 7 2 3 8 2 15 11 3 4 8 2 15 11 3 4 8 3 20 -2 5 2 8 3 20 -2 5 2 8 4 15 -5 4 3 8 4 15 -5 4 3 8 5 15 3 1 12 8 5 15 3 1 12 8 Order to run next Slack per Operation Enter the order number (1,2,3,4, or 5) to run next for each dispatching rule. Note: Time is measured in days. Manufacturing lead-time remaining includes both the machine processing time and the length of time orders spend moving and waiting to be processed in a machine queue. Current operation processing time (as well as total processing time remaining) includes no move or queue times. a) State the formula for calculating the priority index for each of sequencing rules given previously. b) Compute the scheduling priority for each order, four sequencing rules.
Transcribed Image Text:a) Critical Ratio = Order Slack = Shortest Operation next = Slack per Operation = b) Priority Index Calculations: Rule Critical Ratio Order Slack Shortest Operation Slack per Operation Resulting Priority Sequences: Rule Critical Ratio Order Slack Shortest Operation Hint: It is convenient to enter the data in a table, before doing the calculations Problem 8: The ACE Machine Company is considering using a prority scheduling rule in its fabrication shop and must decide whether to use: the critical ratio rule, the order slack rule, the shortest operation next rule, or the slack per operation rule. The following table shows the company's current inventory and shop status. Order # Manufacturing Lead Time Remaining Time Remaining Until Due 1 2 Order 3 Date Current Operation Processing Time # of Operations Remaining Total Processing Time Remaining Manufacturing Order Number Lead Time Remaining Time Remaining Until Due Date Current Operation Processing Time Number of Operations Remaining Total Processing Time Remaining 1 15 7 2 3 8 4 5 1 15 7 2 3 8 2 15 11 3 4 8 2 15 11 3 4 8 3 20 -2 5 2 8 3 20 -2 5 2 8 4 15 -5 4 3 8 4 15 -5 4 3 8 5 15 3 1 12 8 5 15 3 1 12 8 Order to run next Slack per Operation Enter the order number (1,2,3,4, or 5) to run next for each dispatching rule. Note: Time is measured in days. Manufacturing lead-time remaining includes both the machine processing time and the length of time orders spend moving and waiting to be processed in a machine queue. Current operation processing time (as well as total processing time remaining) includes no move or queue times. a) State the formula for calculating the priority index for each of sequencing rules given previously. b) Compute the scheduling priority for each order, four sequencing rules.
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