Push Your Inspection Before Production

By the time you inspect it, the damage is already done. The material is wasted. The time is gone. The rework is queued up.

And yet most plants still rely on end-of-line inspection as their "quality system".

Shigeo Shingo said it best: Inspection doesn't improve quality. It just confirms you already failed.

Here's what actually prevents defects:
- Source inspection : check conditions before the process runs
- Poka-yoke : design the error out so it can't happen
- Process control : monitor parameters, not just outputs
- Immediate feedback : the operator knows in seconds, not hours

The goal isn't better inspection. The goal is making inspection unnecessary.

If your quality system starts after the part is made, you're not controlling quality. You're sorting the good from the bad. And that's not a system. That's a filter.