Bus%203750%20Chapter%2009%20Prioriy%20and%20Activity%20Control

Bus%203750%20Chapter%2009%20Prioriy%20and%20Activity%20Control

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1 Bus 3750: Chapter 9 Production Activity Contro Production Activity Control By: Bruce G. Ferrin and Duke Leingpibul Backward Scheduling (Classic Method) Flying Panda Opn # WC Setup Time (std hrs) Run/unit (std hrs) Operation Queue Time Run Time Wait Time Move Time Set Up Time Work Center File Work Center Queue Time (days) Wait Time (days) Move Time (days) Given Order for 100 units of flying panda Due date = day 31 Scheduling rules Operation times rounded up to nearest eight hours and expressed as days on a one-shift basis. Assume an order starts at the beginning of the day and finishes at the end of the day Op Time (days) 10 + 100 *0.5 =10+50 = 60 hr Convert to day : divide by 24 = 60/24 = 2.5 days Round up to 3 days 2 10 12 10 0.5 Make Panda Head 20 14 80 . 5 At ach Head to Panda body 30 17 10 1 Put Wings on Panda 40 Inventory 12 21 1 14 32 1 17 1 3 3 5 WC 12 WC 14 WC 17 3 1 1 2 33 2 1 2 11 5 29 22 1 1 1 1 1 1 1 1 31st 20 11 13 6 Calendar Method Work Center File: 100 units & 24 hr/day Work Center Queue Time (days) Opt Time (days) Wait Time (days) Move Time (days) Set Run Opt (hr) Opt (est Days) 12 2 10 0.5*100 60 3 1 1 14 3 8 0.5*100 58 3 2 1 3 17 2 10 1*100 110 5 1 1 Sun Mo Tue Wed Thr Fri Sat 1234567 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 Duke’s Method Work Cente r Arrive Queu e Time (days) Wait Time (days) Finish Move Time (days) 4 12 2 1 1 14 32 1 17 21 1 Store 31 27 21 17 29 25 19 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Queue Time Run Time Wait Time Move Time Set Up Time 1 2 4 3 5 6 7 8 12 11 1 3 2 4 5 6 7 1 12 9 8 2 9 10 10 11 AM PM AM Product A: 7 units. Using two processes (2WCs) WC# 1 : Q=1 hr,S =2 hr,R=1 hr/unit,W=1 hr,M = 1hr WC#2 : Q=1 hr,S =3 hr,R=1 hr/unit,W=1 hr, M= 2 hr WC #1 WC #2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 WC #1 1 1 1 1 1 1 1 1 1 1 1 WC #2 Overlap 5 1 1
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This note was uploaded on 04/18/2008 for the course PSCI 3750 taught by Professor Duke during the Spring '08 term at Western Michigan.

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Bus%203750%20Chapter%2009%20Prioriy%20and%20Activity%20Control

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