Posts: 245
From:St. Marys, PA
Registered: Sep 98

posted 19 June 2000 09:32 PM               

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I am looking for something stated in QS pertaining to updating flow diagrams, and I'm not finding anything as far as:
Do we need to update flow diagrams when we determine an internal critical characteristic on a certain operation. Currently, we have a process where we have deemed a certain operation as critical. We have designated it as critical on the fmea, control plan, work instructions but not on the flow diagram. When I asked the QA Engineer why, she stated she never updates the flow diagram for these types of changes. I searched the PPAP manual, and QS book, but found nothing. Any help?

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Posts: 35
From:Waterford, Ireland
Registered: Nov 1999

posted 20 June 2000 10:05 AM               

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Dawn,
My 0.5 Euros worth is that process flow diagrams must by definition show every step of the process. It's by cross referencing from the control plan to a numbered step that we identify that step as critical. I've never seen anything in QS to suggest that process flow diagrams themselves need to show which steps are critical. Even the process flow checklist in APQP manual appendix does not mention highlighting critical steps.

Cheers

brian

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Posts: 4119
From:West Chester, OH, USA
Registered:

posted 24 June 2000 04:34 PM               

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If you use GM's format, each characteristic in the flow diagram is on the control plan so if you ad a characteristic to the CP you have to add it to the associated process on the flow diagra. However, different companies use different formats so some flow diagrams may not have that detail. See the APQP pdf file in the pdf_files directory.

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