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Assembly Line Balancing

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Lecture-5

Assembly Line Balancing
Dr. Dileep S. More Operations Management Group IIM Calcutta

Objectives
• Understand the concept of assembly line balancing • Study a general procedure to balance the line • Study advantages of line balancing

Introduction
• The first movable assembly line was created by Ford to manufacture the Ford Model T • Ford installed a capstan and a thick cable to move the cars between assembly stations

Ford’s assembly line concept

A Line with Multi Operators

A
2 minutes per unit

B
3 minutes per unit

C
5 minutes per unit

D
1 minutes per unit

E
4 minutes per unit

Process Cycle Time = Throughput Rate = Process Capacity = Overall Process Utilization =

A Line with Single …show more content…

• Least number of followers heuristics • Individual duration heuristics: Among the eligible tasks, choose the task with the longest/shortest time ti. If there is tie, select the task that the largest total number of following tasks.

Example 1
• You’ve just been assigned the job a setting up an electric fan assembly line with the following tasks:
Task A B C D E F G H Time (Mins) 2 1 3.25 1.2 0.5 1 1 1.4 Description Assemble frame Mount switch Assemble motor housing Mount motor housing in frame Attach blade Assemble and attach safety grill Attach cord Test Predecessors None A None A, C D E B F, G

• The production time available per day is 420 minutes. • Suppose we want to assemble 100 fans per day. • Balance the line using Most Following Tasks Heuristic

2 A

1 B

1 G

1.4 H F 1

C 3.25

D 1.2

E .5

Task A C D B E F G H

Followers 6 4 3 2 2 1 1 0

Time (Mins) 2 3.25 1.2 1 0.5 1 1 1.4

Station 1 A (4.2-2=2.2) B (2.2-1=1.2) G (1.2-1= .2) Idle= .2

Station 2 C (4.2-3.25)=.95

Station 3 D

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