Abstract
The aim of Toyota production system tries to thoroughly eliminate interior waste. The two major concepts of Toyota production system are Just-In-Time production system and Jidoka. This research discusses a case study on a manufacturing technology of JIT production system, like the "push/pull production System" and the activities of " Genba Kaizen". This research project tries to investigate the essence, the different between the mass production system and the JIT production system in manufacturing efficiency and cost, and then by the activities of Genba Kaizen to eliminate the wasted brought the Benefit of quality, cost and delivery study case. The company of this case study is the vendor of LED supply chain, which is manufacturing the sapphire substrate. The case study company used the different marketing strategies with other competitors that are high-quality and customization. These marketing strategies bring the visibility and the high market share rate. The company need raised the yield and the well cost control to keep this Strengths.The aim of this case study tries to thoroughly eliminate interior waste and proceed with any kinds of cost- down activities. This case study used the SWOT analysis, to find out the problems of the weaknesses and threats, and used the JIT production system to improve the problems then get the maximum benefit. Keywords: JIT production, Push/pull production, Activities of Genba Kaizen