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I have several parts that do not fall within the stated design specifications and will never fall within these specifications due to machine capability not being adequate.
Basically the machines we currently use are considered the best money can buy, the previous manufactured part/s are ‘fit-for-purpose’ (God I hate that statement) and are on the final assembly.
What we would like to do is to assign concessioned tolerances to the ‘fit-for-purpose’ parts for future orders. We have a great deal of manipulation with regards to design changes and have full authority in this situation.
The question is, how do we apply a new tolerance inline with machine capability? The current idea is to open the tolerances using +/- 4 standard deviations, now personally I’m not too convinced about taking this route and would like your feedback and proposed routes of applying a new tolerance.
We understand the machines process capability and have measured this capability over the past year or so.
Your help in this situation is somewhat needed!
Lee01
Basically the machines we currently use are considered the best money can buy, the previous manufactured part/s are ‘fit-for-purpose’ (God I hate that statement) and are on the final assembly.
What we would like to do is to assign concessioned tolerances to the ‘fit-for-purpose’ parts for future orders. We have a great deal of manipulation with regards to design changes and have full authority in this situation.
The question is, how do we apply a new tolerance inline with machine capability? The current idea is to open the tolerances using +/- 4 standard deviations, now personally I’m not too convinced about taking this route and would like your feedback and proposed routes of applying a new tolerance.
We understand the machines process capability and have measured this capability over the past year or so.
Your help in this situation is somewhat needed!
Lee01
