Just-In-Time is a Japanese manufacturing management method developed in the 70's.  It was first adopted by Toyota manufacturing plants by Taiichi Ohno.  The main concern at that time was to meet consumer demands.  Because of the success of JIT management, Taiichi Ohno was named the father of JIT.  After the first introduction of JIT by Toyota, many companies followed up and around the mid 70's, and JIT gained extensive support, which was widely used by many companies. One motivated reason for developing JIT and some other better production techniques was that after World War II, Japanese people had a very strong incentive to develop a good manufacturing technique which would help them rebuild their economy.    They also had a strong working ethic which was concentrated on work rather than on leisure, and this kind of motivation was what drove Japanese economy to succeed. Before the introduction of JIT, there were a lot of manufacturing defects for the existing system at that time.  This included inventory problems, product defects, risen cost, large lot production and delivery delays.  The inventory problems included the unused accumulated inventory that was not only unproductive, but also required a lot of effort in storing and managing them.  In the case of the product defects, manufacturers knew that it only took one single product defect to destroy the producer’s reputation, therefore they must crease a “defect-free” process.  Lastly, the existing system did not manage well for fast delivery request, so, there was a need to have a faster and reliable delivery system in order to handle customers’ needs.  Therefore, the JIT manufacturing management was developed based on these problems.