| The research will be conducted at PT. Willson Surya Unggul, a company that manufactures electrical cables, by analyzing and proposing some improvements to the production system based on lean manufacturing system. Production system current state has problems such as scattered items in the work area, defective products, and the production process takes a long time. In order to make improvements based on lean manufacturing system in the production system, the first step is to create a current state value stream mapping. Based on the map, it shows that the condition of the current system has 0,08% for Process Cycle Efficiency (PCE), a company could be called lean if the percentage of PCE is higher than 30%. The next step is to identify the waste on the production floor with direct observation and to make a waste checklist for the seven categories of waste such as overproduction waste, inventory waste, waiting waste, unnecessary motion waste, conveyance waste, defective product waste, and inefficient process waste. The next step is to find the root cause of the problem and the solution using fishbone diagram and 5W+1H method. According to the root cause of the problem, find the solutions by making proposed improvements ranging from the implementation of 5S, takt time calculation, implementation of one piece flow method, operator balance chart, line balancing, kanban pull systems, and standardization works. The last step is to see improved results through illustrations called future state value stream mapping Tthere are a few changes to the production system PT. Willson Surya Unggul. The previous production system once used push system, now turns into a kanban pull system and total cycle time was reduced from 2217.84 seconds to 1373.03 seconds. Now there are some implementations of 5S and standardization work in the work environment. And the value of previous PCE was increased from 0,08% to 0,38%. |