Development of Barriers and Strategies for Implementing Lean Supply Chain Management in Coastal Wall Construction Projects

The demand for efficient implementation of construction projects is a significant challenge. This demand reflects the limited project resources, which encourage innovation in developing lean systems. One example of such innovation is the integration of lean construction management and Supply Chain Management (SCM), known as Lean Supply Chain Management (LSCM), which aims to improve time and cost efficiency in various construction projects. Unfortunately, the implementation of LSCM often encounters obstacles during construction. Therefore, this research aims to identify and analyze the stages of the LSCM cycle, the main obstacles encountered, and strategies for improving LSCM implementation in foundation work for coastal protection projects. To achieve these objectives, the research method begins with a literature review, followed by case studies, perception questionnaires, and in-depth interviews, which are then analyzed using the Relative Importance Index (RII) method. The results indicate that the primary obstacles include product returns from customers, materials received that do not match the requested specifications, occupational health and safety risks, suppliers failing to fulfill material delivery commitments, and changes in orders or requests. The implementation of LSCM strategies, such as Kaizen, Value Stream Mapping (VSM), Pull System, and 5S (Sort, Arrange, Clean, Standardize, and Maintain), effectively reduces delays and minimizes waste in procurement. This study’s results act as a guide for all parties, which contributes to improving the performance of supply chain integration and lean principles in construction projects.