Line balancing advance
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Transcript of Line balancing advance
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P.VIDYUT CHANDRA
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Line balancing means balancing production line or an assembly line.
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So that there is an even flow of production units from one work station to the next
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This problem is particularly important in plant layouts ..
The finished product is the result of many sequential operations.
The production capacity of each machine /workstation in sequence is not identical .
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To distribute the task evenly over workstations , so that idle time of man and machines is minimized.
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Machines operations are difficult to split in to small work elements for re grouping.
Some operations are inter-related with each other –and have fixed sequence
Example tapping after drilling Machine tools employed cannot be used
for variety of jobs ..without expensive changes in setup and tools ..
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There is no methods which guarantee the optimal solution for a line balancing problem.
1.Kilbridge –weister heuristic( Predecessor number technique)
2.Large candidate rule 3.Heilgeson –Brine (Ranke proportional
methods)
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By sub contracting By diverting extra parts to another
machine not in line. Having more than one machine at slow
work station. Or changing the speed of machine .
Motivating and improving performance of worker or assigning job to efficient worker.
Providing a buffer stock of semi finished parts
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Work element is a part of total job content.
Work station is combination of few work elements are performed on part/component.
Station time is the time required to perform the designated amount of work at a given station.
Total work content is algebraic sum of all the work elements on the line.
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Cycle Time is time required to complete one job
Delay or idle time of ith station = cycle time – (work content of ith station / cycle time) - station time.
Or it is difference between the cycle time and station time
Balance delay is the measure of line efficiency.