Lean product ion and value stream mappingin warehouse managementLean production was originated from Toyota with the name“ Toyota Product ion System (TPS) ” or “ just-in-time (JIT) ” ,or “ pull-sys tem. ” On the basis of continuous improvementand the philosophy of doing more with less, lean productionfocuses on waste identification and elimination by allowingonly the minimum amount of processing time, lot size,product ion resources, material, inventory, and cost.In recent years, value stream mapping (VSM) has emergedas the preferred way to implement lean production by map-ping a productive process and identifying waste for improvement.