《流水生產(chǎn)組織》ppt課件(文件)
【正文】 2 F 1 1 G 1 1 H 0 A (=) B (=) G (= .2) Idle= .2 Station 1 Station 2 Station 3 C ()=.95 Idle = .95 A C B D E F G H 2 1 .5 1 1 Task Followers Time (Mins) A 6 2 C 4 D 3 B 2 1 E 2 F 1 1 G 1 1 H 0 A (=) B (=) G (= .2) Idle= .2 Station 1 Station 2 Station 3 C ()=.95 Idle = .95 A C B D E F G H 2 1 .5 1 1 D ()=3 Task Followers Time (Mins) A 6 2 C 4 D 3 B 2 1 E 2 F 1 1 G 1 1 H 0 A (=) B (=) G (= .2) Idle= .2 Station 1 Station 2 Station 3 A C B D E F G H 2 1 .5 1 1 C ()=.95 Idle = .95 D ()=3 E ()= Task Followers Time (Mins) A 6 2 C 4 D 3 B 2 1 E 2 F 1 1 G 1 1 H 0 A (=) B (=) G (= .2) Idle= .2 Station 1 Station 2 Station 3 A C B D E F G H 2 1 .5 1 1 C ()=.95 Idle = .95 D ()=3 E ()= F ()= Task Followers Time (Mins) A 6 2 C 4 D 3 B 2 1 E 2 F 1 1 G 1 1 H 0 A (=) B (=) G (= .2) Idle= .2 Station 1 Station 2 Station 3 Which station is the bottleneck? What is the effective cycle time? A C B D E F G H 2 1 .5 1 1 C ()=.95 Idle = .95 D ()=3 E ()= F ()= H ()=.1 Idle = .1 Task Followers Time (Mins) A 6 2 C 4 D 3 B 2 1 E 2 F 1 1 G 1 1 H 0 A (=) B (=) G (= .2) Idle= .2 Station 1 Station 2 Station 3 Example of Line Balancing: Determine the Efficiency of the Assembly Line E f f i c i e n c y = S u m o f t a s k t i m e s ( T )A c t u a l n u m b e r o f w o r k s t a t i o n s ( N a ) x C y c l e t i m e ( C )E f f i c i e n c y = 1 1 . 3 5 m i n s / u n i t( 3 ) ( 4 . 2 m i n s / u n i t ) =. 901? 組織工序同期化的方法 ? 例：某產(chǎn)品的生產(chǎn)節(jié)拍為 10分鐘，各工步的時間定額和工步順序如下圖示： 1 2 3 4 5 6 7 8 10 9 11 6 2 5 7 1 2 6 3 5 4 5 Station 1 Minutes per Unit 6 Station 2 7 Station 3 3 Assembly Lines Balancing Concepts Question: Suppose you load work into the three work stations below such that each will take the corresponding number of minutes as shown. What is the cycle time of this line? Answer: The cycle time of the line is always determined by the work station taking the longest time. In this problem, the cycle time of the line is 7 minutes. There is also going to be idle time at the other two work stations. Example of Line Balancing ? You’ve just been assigned the job a setting up an electric fan assembly line with the following tasks: T a s k T i m e ( M i ns ) De s c r i pti o n P r e de c e s s o r sA 2 As s e m b l e f r a m e No n eB 1 Mo u n t s w i t c h AC 3 . 2 5 As s e m b l e m o t o r h o u s i n g No n eD 1 . 2 Mo u n t m o t o r h o u s i n g i n f r a m e A, CE 0 . 5 At t a c h b l a d e DF 1 As s e m b l e a n d a t t a c h s a f e t y g r i l l EG 1 At t a c h c o r d BH 1 . 4 T e s t F, GExample of Line Balancing: Structuring the Precedence Diagram Task Predecessors A None A B A B C None C D A, C D Task Predecessors E D E F E F G B G H E, G H Example of Line Balancing: Precedence Diagram A C B D
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