Assembly line need to be design properly base on the types of product, workloads required, numbers of daily
production as well as others element. The balance assembly line is the line that has high value of line efficiency. The
higher output of the line can be considered as the efficient line because more number of products can be produced in
the specific production time. Through process observation and time study that been conducted in automotive
component manufacturer, the data analysis revealed line balancing efficiency at that company has increased by
16.3% when the layout being redesigned from straight line to U-shape line. The redesign of the line layout has effect
some changes in the processing the workpieces where time difference between operators involved reduced from
15.6 second to 6.9 second which means the operators have to perform approximately equal workload. Furthermore,
total process cycle time require to completely assembling the product reduced from 133.0 second to 122.3 second
equivalent to 8.0% time reduction. The process improvement activity achievement is not only depends on the
redesign of the layout but it also involved operators position arrangement, minimize idling time and changing the
work sequence.