Subcontractor (Supplier) SPC

A

Andrews

#1
SPC at subcontractor end

We are having problems in implementing SPC at subcontarctor end basically due to the subcontractors being companies with only 2 - 5 people and all the people , who are responsible for operating the machine as well . In such cases what can one do?

Can we implement Pre-control chart instead which is easier to understand and implement for those special characteristics that were identified by us?
 
Elsmar Forum Sponsor
A

Al Dyer

#2
Ask what their level of commitment is and if they want to continue selling you goods. You are the customer and decide what controls are requiured. Decide what you require and tell the suppliers. Otherwise the suppliers might get into a position where they are controlling you.


Al...
 
#3
Andrews asks,
"Can we implement Pre-control chart instead which is easier to understand and implement for those special characteristics that were identified by us?"

Check with your SQA. I have been told by Ford SQA's that they will not accept the pre-control methodology.
 
J

JaySturgeon

#4
Andrews asks,
"Can we implement Pre-control chart instead which is easier to understand and implement for those special characteristics that were identified by us?"

Check with your SQA. I have been told by Ford SQA's that they will not accept the pre-control methodology.

__________________
Sam Goody


I have used Pre-Control and then used the data to show Cpk. Ford bought off on that concept. Have to crunch the numbers.

Jay Sturgeon
 

ksanders

Involved In Discussions
#5
At what point during product developoment were these critical characteristics determined. (Are the dimensions listed as critical on the drawing?) I can understand your suppliers attitude if you are coming in after PPAP and asking the supplier to control dimensions that were not previously discussed during product development, without some help with the commercial aspects.

If this was discussed during development, I agree that they really have no choice but to implement. You may find that, since the organization is small, you may have to offer assistance with training and implementation to get them started. If they do not chooses to implement, have them 100% the dimensions and let them decide which approach is the most cost effective.

A second approach if you have not yet given PPAP approval is to hold this until you are satisfied that the control plan and PFMEA contain control charting to address the area where you have designated critical characteristics or high RPN values.

One last question, When you were selecting this supplier, did you assess their quality system to insure they could satisfy all you needs, including SPC requirements?
 
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