Lean manufacturing or
lean production, often simply "
lean", is a systematic method for the elimination of waste ("
Muda") within a manufacturing system. Lean also takes into account waste created through overburden ("
Muri") and waste created through unevenness in work loads ("Mura"). Working from the perspective of the client who consumes a product or service, "value" is any action or process that a customer would be willing to pay for.