improvement in production line efficiency of hemming unit using line balancing techniques - sciencedirect
The present work aims at improving the production line efficiency of a hemming unit by implementing three different line balancing techniques. For real time study, a hemming unit which involves 12 different work stations with manual execution was considered. The average actual cycle time at each station obtained through past data and the takt time for each station were compared using Yamazumi chart, which pertains to a line efficiency of 44% initially. It is found out that implementation of the line balancing techniques such as Kilbridge and Wester Column, Ranked Positional Weight, and Largest Candidate Rule significantly improved the line efficiency to 69%. The methods also established the possibility of reducing the number of work stations from 12 to 8. Out of the three methods, the Ranked Positional Weight method is found to be more effective for the present case, through Arena simulation.