Efficiency improvement of door frame manufacturing process in wood product manufacturing industry

This study aims to improve the efficiency of door frame manufacturing process in wood product manufacturing industry. The major causes of delay in the process were analyzed by using standard time analysis and Sinpaiboon Kamai Co., Ltd. was selected as a case study. It was observed that the standard times of fine polishing and assembling were higher than Takt time that finally resulted in low production capacity and delivery problem. Therefore, subtask procedures of those tasks were rearranged and work environment was improved. After implementing new work process, the cycle time was reduced from 100.3 min/unit to 63.1 min/unit or about 37.1%. The productive capacity could be increased from 560 units/month to 1,200 units/month or 53.3% Moreover, the company could achieve the 100% delivery goal after improvement.