Competitive TV business makes a force in manufacturer to figure out a huge contribution in cost reduction instead of just material and design cost. Hence, productivity is the main target area to be improved. Previously, one of the contributed costs for manufacturing cost is the direct labor cost. But, since productivity improvement effort is done actively, no clear measurement method used because labor cost was calculated using a fix predetermined standard time. Therefore, the main objective is to verify whether the predetermined standard time is accurate enough to measure the productivity improvement effort where it was set higher to its actual tact time by 19%. By conducting a standard time study with actual manual production line which consist of eleven work stations and twelve operators, there are 5 revision items selected to be revised to a new series of standard time based on its actual time and 15% human factor allowance, which is the second objective of the study. The objectives of this study were accomplished by using an action research where it consists of specific video recording activity which was analyzed using an industrial software called OTRS. From here, data comparison was done and it shows a total of 1.96min is saved from the original predetermined standard time. Ultimate result of this study is; there were five processes that have been revised its standard time which has big difference between its predetermined standard time and its actual production time. Indirectly resulting to actual labor cost reduction of USD$846,615.