Just-In-Time is a manufacturing philosophy which leads to producing the required items, at the required quality and in the right quantities at the precise time as they are required.  It is an approach to achieving excellence in elimination of waste.  In this case waste can be thought of as all things that don’t add value to the product.  Overproduction, Inventory, defect products, transport and waiting time are some examples of what can be waste according to JIT. Just-In-Time manufacturing is a system of enforced problem solving.  Managers have the choice between putting a huge effort in finding and solving causes of production problems, or they can learn to live with an intolerable level of interruptions in production.  As everybody knows, the situation in which one has to put huge efforts is highly undesirable, and therefore the system is called enforced. Quality within JIT manufacturing is necessary, because without a quality program in JIT, the JIT will fail.  Here we think about quality at the source and the Plan, Do, Check, Action with its statistical process control.  Furthermore, techniques is also very important.  The JIT technique is a pull system rather than a pull system, based on not producing things until they are needed.  The well known Kanban card is used as a signal to produce.  Moreover, integration also plays a key role in JIT systems.  JIT integration can be found in four points of the manufacturing firm.  The Accounting side, Engineering side, Customer side and Supplier side.  At the accounting side, JIT has concern for WIP, utilization and overhead allocation and at the engineering side of JIT focuses on simultaneously and participative design of products and processes.
Just-In-Time has its influence in ordering, scheduling and producing sides of a manufacturing firm.  JIT production contains the well known Kanban System.  This influence in the manufacturing firm is depending on employees, suppliers or customers.  Therefore a large element of training is put toward the JIT to reach certain goals.  One of these goals are mutual trust and teamwork.  This is an important factor in the JIT principle.  When managers and workers see each other as equal, committed to the organization and it’s success, they are more willing to co-operate with each other in order to find the problems and solve these problems.  Moreover, a firm which empowers it’s workers, gives the workers the authority to solve problems on their own.  When
this is done, workers have the authority to stop production and to solve problems, instead of first waiting for guidance from a supervisor.  The objective of worker empowerment is having workers involved in the problem as it occurs. In all, JIT is an important operational system for manufacturing and supplying companies to adopt
and implement.  Technically, procedurally and managerially it requires attention to data,
information and communication.  But if looked at through the eyes of the corporation that has implemented the JIT system, the positive outcomes that arise from the use of the system is far greater than those that are not.  The JIT system really is a state of the art idea that is beginning to catch on in a tremendous way all over the world.