Just in Time---manufacturing is a systems method to develop and operate a factory system. It is mainly basis on the total Decrease of waste. As you know, many people think JIT is not a new knowledge field. As a matter of fact, it has been part and plays an important role of the Japanese manufacturing industry adopted method for a long time . It requires all the materials such as equipment, human resources, and management skills are made available only in the amount required and at the time required to do the job. It is based on producing only the necessary units in the necessary quantities at the necessary time by bringing production rates exactly in line with market demand. Generally speaking, JIT means making what the market wants. JIT has been found to be so effective that it increases productivity, work performance and product quality. What’s even more, it plays a vital role to increase productivity and decrease the total cost of manufacturing production.