准时化生产（just-in-time，JIT）诞生于20世纪50年代的日本，并于70年代全球石油危机中倍受关注。准时化生产是丰田生产方式的核心。它采用“看板管理”实现“拉动”式生产，与传统的以计划为主的“推动”式生产有着本质区别。全面质量管理、设备合理布置、作业标准化、设备快速调整以及良好的外部协作等方法，确保了准时化生产的顺利实施。-Production on time (just-in-time, JIT) was born in 20th century Japan, the 50' s and 70' s in the global oil crisis has drawn greater attention. Production on time are the core of Toyota Production System. It uses " Kanban management"　implementation " pull"-style production, with traditional plan-based " push"　is essentially different from production. Total quality management, equipment layout reasonable, standardized operations, equipment and adjust Express good external collaboration and so on, on time to ensure the smooth implementation of production.