Project to Reduce Destructive Sampling in Crimping Process

D

Daniel-Phenomenom

#1
Hi, Everyone,

I just want some advice regarding a project for reducing destructive samples in crimping process. I started an analises to justify that to our customer
1.- went to CPk calculations last 3 months.. results were above 2.0 CPK value
2.- I tried to make an Hypotheses test to justify reduction of destructive samples (from 40 to 20) to do that I used F fischer test estimating variance between 2 samples.
3.- According to calculations there is not significant difference between varaiances of the 2 samples.. therefore shall I go forward and reduce the sampling with the information..

Help is welcomed

Daniel
 
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Jen Kirley

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#2
Re: Project to reduce destructive sampling

Welcome to The Cove Daniel! :bigwave:

Sampling plans may permit reducing the number of parts sampled once a low failure rate has been established.

What limits your ability to do that is customer requirements. Contracts, specifications, etc. that call out requirements would need to be followed or renegotiated.

Anyone else have input? I am better at answering questions about micrometers.
 
W

world quality

#3
Re: Project to reduce destructive sampling

Daniel,

If your data is being maintained at 2.0 CPK and stable then and has remain this way foe two to three weeks with any capability drop then show reduced
sampling from 40 to 20 but you must reliaze if the sampling plan at 20 faltures
then you will need to show how, when, and where, and what happen. and shift back to the 40 sampling plan.

You might start with reduction to 30 for a month and she if it stablizes and
then show a drop to 20 after that.


This will be as stated before all aspects come in to plan with each reduction.
 
D

Daniel-Phenomenom

#4
:thanks: Guys for your response,

I am moving forward with your suggestions. in fact this characteristic is not customer designed but internal control so I dont think there is going to be an issue with the customer.

And I will keep monitor the Cpk-ppK to look for any capability drop.

Once again thanks and it was good 1st experience in this forum.

Look forward to talk to you again

Best Regards

Daniel Gonzalez L
 
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