Mistake proofing 1

[QAgirl]

We are a commercial heat treating plant who is currently undergoing our QS9000 registration. I am having trouble defining mistake proofing. None of he manuals that we have give a specific definition, only that verification by an operator ( visual ) is not enough. Any information on mistake proofing would be appreciated.
Thanks

 

[BML]

Generally speaking, mistake-proofing (also called poka-yoke, and spelled in a variety of ways) involves designing the parts, assemblies, and fixtures such that a defective part cannot be used or made. Some examples include:

- Using locating holes and pins to orient a part in the correct position.
- Designing a fixture so that an incorrect size part won't fit.
- Designing tooling so that it cannot physically make a defective part.

The main focus should be (1) don't make a bad part, and (2) parts and assemblies should be "self-inspecting".

Hope this helps!