打破一个瓶颈，改善就结束了吗？Once one bottleneck is broken, is the improvement work finished?
五步聚焦要求先识别约束、挖尽约束、让其他环节迁就约束，再投入资源打破它。关键在第 5 步：瓶颈不会消失，只会转移。本页给第 3 站加并行第二台机，把等效 C/T 从 16 秒降到 8 秒；随后第 4 站“整理”（10 秒）立即成为新瓶颈。The five focusing steps identify the constraint, exploit it, subordinate the rest of the system, and only then elevate it. Step five is the point: the constraint does not disappear; it moves. This simulation adds a parallel machine at station 3, cutting its effective cycle time from 16 to 8 seconds. Station 4, Finish, then becomes the new 10-second constraint.
💡 跑完看数据：旧瓶颈打破后，马上回到第一步找新瓶颈💡 Run it, then read the numbers: once the old constraint is elevated, return to step one
前后两档由同一 Line DES 的 stats() 计算Both cases come from the same Line DES stats()| 状态State | 90 秒产量Output / 90 sec | 瓶颈位置Constraint | 瓶颈 C/TConstraint C/T | 产量变化Output change |
|---|---|---|---|---|
| 打破前Before | — | — | — | — |
| 打破后After | — | — | — | — |
- 识别Identify
找限制整体产出的工序Find what limits total output - 挖尽Exploit
不让瓶颈等料、停机Keep the constraint fed and running - 迁就Subordinate
其他工序跟鼓走Make the rest follow the drum - 打破Elevate
并行第二台，C/T 16→8sAdd a parallel machine, C/T 16→8s - 回头Repeat
回到第 1 步，别让惰性成为瓶颈Return to step 1; do not let inertia become the constraint
读数边界：两档都从空线开始、每 2 秒投料、运行 90 秒；唯一变化是第 3 站从单机 C/T 16 秒变成两台并行的等效 C/T 8 秒。Measurement boundary: both cases start empty, release one part every 2 seconds, and run for 90 seconds. The only change is station 3 moving from one 16-second machine to two parallel machines with an effective 8-second cycle.
瓶颈永远存在，只是换了位置；打破一个，就回到第一步重新识别。A constraint always exists; only its location changes. Elevate one, then return to step one.