生產(chǎn)與運(yùn)作管理2(1)-資料下載頁(yè)
2025-01-18 23:54本頁(yè)面
【正文】 ce Delay, BD = 1 — ?? Task times * (Cycle time) (Actual number of work stations) 可行的作業(yè)分配 分配給每個(gè)工作地的作業(yè)，必須： ?（ 1）滿足作業(yè)之間的優(yōu)先(precedence)關(guān)系； ?（ 2）分配給每個(gè)工作地的作業(yè)的時(shí)間之和必須不大于周期時(shí)間。 Layout Heuristics for Assigning Tasks in Assembly Line Balancing ?Longest task time choose task with longest operation time ?Most following tasks choose task with largest number of following tasks ?Ranked positional weight choose task where the sum of the times for each following task is longest ?Shortest task time choose task with shortest operation time ?Least number of following tasks choose task with fewest subsequent tasks ?Random – choose task randomly Example Task A B C D E F G H I Time (min.) 10 11 5 4 12 3 7 11 3 Task must follow A B B A C, D F E G, H A B E H C D F G I 10 Min. 5 11 12 3 7 3 4 11 480 productive min., plete 40 units, each day. Example 1266/.min1240.min480m in?????Nun itun itsCTExample 工作地 可用時(shí)間 可選擇 作業(yè) 可分配 作業(yè) 分配 作業(yè) 工作地空閑時(shí)間 1 1 2 A A A( 10 ) 2 2 1 2 B ,E B ,E E ( 12 ) 0 3 1 2 B ,H B ,H B ( 11 ) 1 4 1 2 C ,D,H C ,D,H H ( 11 ) 1 5 1 2 7 3 C ,D D F C ,D D F C (5 ) D( 4) F (3) 7 3 0 6 1 2 5 G I G I G ( 7 ) I ( 3) 5 2 工作地空閑時(shí)間合計(jì) 6 C = 12 min. Longest task time A B E H C D F G I 10 Min. 5 11 12 3 7 3 4 11 Example: Six Station Solution A B C E D F G I H 10 11 5 3 7 3 11 12 4 Example %1266611%1266611????????????????CTNtBDCTNtBEmiimiiA E B H 10 11 12 10 工作時(shí)間 0 0 2 2 空閑時(shí)間 C,D,F G,I 12 11 1 1 Cellular Layout Work Cells ?Special case of productoriented layout in what is ordinarily a processoriented facility ?Consists of different machines brought together to make a product ?Temporary arrangement only 222 333 444 111 222 333 444 111 銑床 車(chē)床 鉆床 熱處理 齒輪銑 車(chē)床 鉆床 熱處理 磨床 銑床 銑床 熱處理 磨床 車(chē)床 銑床 鉆床 齒輪銑 裝配 單元布置 222 222 444 444 111 333 111 裝配 111 444 222 333 333 222 333 111 銑床 車(chē)床 磨床 鉆床 熱處理 齒輪銑 面向過(guò)程布置 111 333 111 444 222 Work Cell Floor Plan Office Tool Room Work Cell Saws Drills Work Cell Advantages Inventory Floor space Direct labor costs Equipment utilization Employee participation Quality Requirements for Cellular Production ?Identification of families of products group technology codes ?High level of training and flexibility on the part of the employees ?Either staff support or flexible, imaginative employees to establish the work cells initially 案例： SSS唱機(jī)制造公司 ?文本 ?分析
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