设备开机 300 秒，真正做出好件的只有 200 秒The machine is scheduled for 300 seconds. Only 200 seconds become good output.
OEE 不只问“设备有没有转”，而是把故障、换型、小停机、降速、启动废品与过程废品逐层扣出来。本页固定同一份 300 秒事件脚本：先看六大损失怎样吃掉时间，再逐项开启自主保养、快速换模、标准作业和防错。OEE asks more than whether the machine was turning. It separates breakdowns, setup, minor stops, reduced speed, startup rejects, and process rejects. This page replays one fixed 300-second script, then applies autonomous maintenance, quick changeover, standard work, and error-proofing one countermeasure at a time.
💡 跑完看数据：300 秒在哪一层被吃掉💡 Run it, then read the numbers: where the 300 seconds went
瀑布、仪表与横幅同源 stats()Waterfall, gauges, and banner share stats()核算闭环：OEE = A × P × Q = 理想节拍 4 秒 × 好件数 ÷ 计划时间。周期尾数单列，是因为离散件在 300 秒截点留下不足一个完整周期的时间；它不伪装成第七类损失。Accounting check: OEE = A × P × Q = ideal cycle time × good pieces ÷ planned time. The cycle remainder is shown separately because a discrete count leaves an incomplete cycle at the 300-second cutoff; it is not presented as a seventh loss category.
先把六大损失逐条量出来，再把 85% 以上治出来；OEE 不是设备采购理由。Measure each of the six big losses, then improve past 85%. A low OEE is not a purchase order.