Lean manufacturing or lean production is a system and culture which aims at maximizing the output of a manufacturing process with minimal inputs with the help of many lean techniques and tools. It aims at reducing work in progress,downtime, buildup of excess raw materials,finish goods, and all waste. Under a lean manufacturing production line, customer orders determine the production schedule thus it is named a pull system. In order for this system to be successful workers must be multi skilled, quality outputat each step of the process,standardised tasks and processes and fairly predictable demand with strong relationships with customers and suppliers. These characteristics are very important and have been present in many Japanese manufacturing companies that excel in lean production systems and value adding production systems. Learning and understanding the many lean concepts will help the operations/process engineer and lean team implement and structure lean initiatives and production tasks that will deliver increases in output with the same or minimal inputs into their process. More lean concepts and terms