Lean manufacturing refers to the manufacturing system which is based on the principle of minimizing waste and maximizing value in the manufacturing process.  A widely held view of lean manufacturing or lean production is that it is just a means for scheduling production that results in minimal levels of inventory. But in the truest sense, the system represents a philosophy that includes every aspect of manufacturing, from designing to after the sale of a product. The philosophy is to pursue a system that performs well with low levels of inventory, minimal waste, minimal space, and minimal transaction- laterally, a ‘lean’ system.  As a result, the system is not prone to interruptions and is flexible in terms of product variety and range of volume that it can handle.