L
lornzky
Hi,
In our test fixture qualification procedure, it was mentioned that Pp/Ppk is to be used as a measurement to qualify a test fixture.
But I disagree to this approach, because to me GR&R is more appropriate due to the following.
- Test fixture/equipment only tells us if the board passes or fails based from the pre-defined test parameters and limits provided by our customer
- Once the customer defines those test limits, they won?t allow these limits to be changed just to have a good ppk/pp result because what they care about is just for the assembly to pass for its intended application.
- The test fixture/equipment does not have any control on the input(PCB assembly) to get a good output.
Any thoughts is much appreciated... Thanks
In our test fixture qualification procedure, it was mentioned that Pp/Ppk is to be used as a measurement to qualify a test fixture.
But I disagree to this approach, because to me GR&R is more appropriate due to the following.
- Test fixture/equipment only tells us if the board passes or fails based from the pre-defined test parameters and limits provided by our customer
- Once the customer defines those test limits, they won?t allow these limits to be changed just to have a good ppk/pp result because what they care about is just for the assembly to pass for its intended application.
- The test fixture/equipment does not have any control on the input(PCB assembly) to get a good output.
Any thoughts is much appreciated... Thanks