CV. TMJ (Tuah Mujolai) is a company engaged in manufacturing that produces door frames, window frames, and tables. This research focuses on the manufacture of door frame products where this product always has ordered every month. In the production process, the make-to-order system is implemented. Based on the results of initial observations made by interviewing the company's owner and direct observation, it is known that there are indications of related problems. Namely, Waste or nonvalue added activity in the production process such as excessive processes, delays, defective products, and transportation. Therefore, to reduce the Waste that occurs, it is necessary to apply a Lean Manufacturing approach that uses several tools such as Value Stream Mapping (VSM) to visualize the flow of materials from raw materials to finished products and Root Cause Analysis (RCA) to find the root cause of the Waste that occurs until the end. waste can be reduced or eliminated.

Keywords :

Lean Manufacturing, Waste, Value Stream Mapping (VSM), Root Cause Analysis(RCA), Fishbone