Sustainable Lean Supply Chain to Minimize Waste in Solar Water Heater Production Emelia Sari1*, Tiena Gustina Amran1, Kinanti Mutiara Takari1, Annisa Dewi Akbari1, Tengku Nur Azila Raja Mamat2
1. Universitas Trisakti, Faculty of Industrial Technology, Department of Industrial Engineering, 11440, Kyai Tapa No 1, West Jakarta, Indonesia
2. Faculty of Engineering Technology, Universiti Tun Hussein Onn Malaysia, Pagoh Higher Education Hub, 84600 Pagoh, Muar, Johor, Malaysia
Abstract
Solar water heater production is a manufacturing company dedicated to the supply of new and renewable energy. However, the company^s failure to achieve the production target is a significant challenge. The research objective is to improve the supply chain flow by implementing a sustainable lean supply chain. The research process steps: 1) identification of gaps in activities within the supply chain flow through value chain analysis, 2) determination of the types of waste, 3) construction of an Ishikawa Diagram, 4). calculation of the Sustainability Index (SI), 5) implementation of improvement. The results in process cycle efficiency increase by 10%. After the improvement, process activity mapping identified eight movements, 34 waiting, five defects, and five behavioral activities. The calculation of the SI improved from 142% to 121%. In conclusion, the research approach reduces waste and enhances production efficiency by integrating economic, social, and environmental into the improvement process and successful manufacturing practice.
