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auditing SOP Procedures Finished product evaluationi

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#1 Mazie

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Posted 20 April 2015 - 08:24 PM

Does anyone have an SOP or procedure for auditing a finished lot for defects?



#2 mgourley

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Posted 21 April 2015 - 08:33 AM

More information is required.

A finished lot of what?

Are there specifications? Customer requirements?

 

Marshall



#3 Mazie

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Posted 21 April 2015 - 03:28 PM

I was looking for a guideline for an SOP on random sampling of a finished lot of product (any food)- looking for a quality defect. 

If you suspect a quality defect - or just want to verify that the specification was met during production. 

Is there a specific sampling plan that is recommended?  I have always heard "square root + 1" but this seems a bit excessive (example: we have 3686 units in a batch - that would be 62 units to inspect).

We are under the cannery regulations and from time to time the inspector wants to verify a specific quality attribute.  I need to put together an SOP so that we inspect consistently - and it does not get out of hand.  I was hoping to have this inspection done by my team in a controlled fashion - and have the inspector accept the records of the inspection in lieu.

I was looking for sampling standards - if there are any that exist in this situation.

 

Thanks for your help :biggrin:



#4 Charles.C

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Posted 21 April 2015 - 03:59 PM

Hi Mazie,

 

Square rooots and the like are semi-scientifically based.

 

Tthe options typically relate to yr acceptable limits, yr desired accuracy, the variation of the attribute within the lot, whether destructive or non-destructive sampling is involved, cost of analysis, etc, etc.

 

As mgourley stated, it all depends on the details.

 

In principle,there are (at least) 2 basic approaches to yr attribute query. As a starter, could have a look at this post and the surrounding thread  -

 

http://www.ifsqn.com...aql/#entry82001


Kind Regards,

 

Charles.C


#5 Charles.C

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Posted 21 April 2015 - 04:37 PM

Hi Mazie,

 

just as addendum to previous, these 3 threads are primarily non-AQL oriented -

 

http://www.ifsqn.com...ecs/#entry72991

http://www.ifsqn.com...uct/#entry26434

http://www.ifsqn.com...ans/#entry64942


Kind Regards,

 

Charles.C


#6 lmarsh16

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Posted 08 May 2015 - 03:54 PM

HI,

 

I have used mil inspections in the past for this type of inspection.  Interactive sampling plans can be found at www.sqconline.com.  Hope this helps.

 

Regards,

Lynne



#7 Charles.C

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Posted 08 May 2015 - 04:13 PM

HI,

 

I have used mil inspections in the past for this type of inspection.  Interactive sampling plans can be found at www.sqconline.com.  Hope this helps.

 

Regards,

Lynne

 

Appears to require an account / money


Kind Regards,

 

Charles.C


#8 Philip Jones

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Posted 10 July 2015 - 11:02 AM

Just google "mil std 105d"

 

This standard is no longer supported by the US Army, but the tables are still valid and replicated in ANSI/ASQ Z1.4: Sampling procedures and Tables for Attribute Sampling..  Unfortunately $159, though

 

 

 

 As a free example you will find in google ...

 

 

http://everyspec.com...STD-105D_11676/  with a download button

 

Regards,

 

The Director







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