APPLICATION OF LEAN THINKING TO REDUCE WASTE OF WEIGHT HAND MODEL WH - 6400 CASE STUDY : AUTOMOTIVE INDUSTRY MANUFACTURING PARTS APPLICATION OF LEAN THINKING TO REDUCE WASTE OF WEIGHT HAND MODEL WH - 6400 CASE STUDY : AUTOMOTIVE INDUSTRY MANUFACTURING PARTS

Abstract

This thesis attempts to use lean theory to lower product inventory levels while maintaining suitable customer demand levels and to lessen process flaws brought on by the rough surfaces of the motorcycle end weight handlebar WH - 6400. The basis for this project was the collection of waste data from the production process through research, the detailed analysis of the issue through the use of cause-and-effect charts, the implementation of Lean manufacturing techniques, including the principles of the Kanban system and warehouse management, and the study of relevant theories and research to address issues and reduce all seven wastes.  The results of this thesis shows that, the production process department can reduce striped surface waste from 2.62 % to 1.16 %. After applying the Kanban system principle can reduce mass production using lean theory from 7 days to 4 days, reduce the products stored in the warehouse from 16,261 pieces to 360 pieces, or 15,901 pieces and reduce production costs from 162,610 baht to 3,600 baht, total of 159,010 baht or 97.79 %

Keywords : Lean manufacturing,  Value stream mapping,  Inventory.