Which of the following is not correct: Lean inventory refers to more than sufcient inventory with some additional safety stock to ensure that a system is running perfectly. The three pillars of Toyota Production System (TPS) are continuous improvement, respect for people, and standard work practices. Throughput and reduced inventory are the focuses of Just-in-time (JIT) problem solving approach. Overproduction, Queues, Transportation, Inventory, Motion, Overprocessing, Defective product are seven categories of wastes