Factory%20Planning L5

13 10 4292011 copier example perform ance time task

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Unformatted text preview: e Time Task (minutes) A 10 B 11 C 5 D 4 E 12 F 3 G 7 H 11 I 3 Total time 66 480 available Task Must Follow m ins per day Task Listed Below 40 units required — A Production time B available per day Cycle time = Units required per day B A = 480 / 40 5 C, D = 12 minutes per unit C F 10 3 7 n 11 E A ∑ Time for task F B G i Minimum G, H i =1 4 3 number of = Cycle time w orkstations 12 D 11 I = 66 / 12 E H = 5.5 or 6 stations Figure 9.13 Copier Example Line-Balancing Heuristics 1. Longest task time Choose the available task 480 available Perform ance Task Must ith the longest task time w Follow m ins per day Time Task Listed Task . Most following tasks Below (minutes) 40 task required 2 Choose the available units w number of A 10 — ith the largest Cycle time = 12 mins f B 11 Aollowing tasksMinimum C 3. Ranked positional 5 B workstations = 5.5 or 6 Choose the available task for D B hich the sum of following weight 4 w E 12 Aask times is the longest t 5 F 3 C, D 4. Shortest task time Choose the available task C G 7 F 10 11 3 7 with the shortest task time H 11 E A B G F I 5. Least number of 3 G,Choose the available task H 4 3 f time 66 with the least number of Totalollowing tasks D I 12 11 following tasks E H Table 9.4 Figure 9.13 11 4/29/2011 Copier Example 480 available Perform ance Task Must Follow m ins per day Time Task Listed Task (minutes) Below 40 units required A 10 — Cycle time = 12 mins B 11 A Minimum Station 5B C 5 workstations = 5.5 or 6 2 CB D 4 11 3 7 E 10 12 A FA B 3 C, D F G 4 3 G 7 F Station 4 DE H 11 I I 3 G, H 12 11 Station 6 Station Total time 66 E H 1 Station 3 Station 5 Figure 9.14 Copier Example 480 available Perform ance Task Must Follow m ins per day Time Task Listed Task (minutes) Below 40 units required A 10 — Cycle time = 12 mins B 11 A Minimum C 5 B workstations = 5.5 or 6 D 4 B E 12 A F 3 C, D G F ∑ Task times Efficiency = 7 (actual number of workstations) x (largest cycle time) H 11 E I 3 G, H ) x (12 minutes) = 66 minutes / (6 stations Total time 66 = 91.7% 12 4/29/2011 Make a list of all the assembly elements • Time for each element • List which elements must precede the current task • Optimize the time flow by assigning task elements to work stations Task Element 1 2 3 4 5 6 7 8 9 Element Time (min) 0.2 .4 .7 .3 .8 .6 .2 .2 .8 Preceding Elements Element Description Na 1 1 2 3 3 4 4 5 Place axel on car Place studs on axel Lubricate axel Place tire on wheel Place wheel on axel 13...
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This note was uploaded on 12/29/2012 for the course ISE 543 taught by Professor Araby during the Spring '12 term at MSA University.

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