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September 2007

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Subject:
From:
"Whittaker, Dewey (EHCOE)" <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Whittaker, Dewey (EHCOE)
Date:
Thu, 20 Sep 2007 08:30:21 -0700
Content-Type:
text/plain
Parts/Attachments:
text/plain (512 lines)
Her request was for a name for a new kitten, so Daniel leaves me with
the following:

*         A reference to Panthera Leo

*         All the fibbing going on

*         Dealing with all the thorny issues

*         All the Tin-whiskey mitigating scenarious

 

Dewey

 

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Ahne Oosterhof
Sent: Thursday, September 20, 2007 8:06 AM
To: [log in to unmask]
Subject: Re: [TN] Reliability of Class 1,2,3

 

How about Daniel?

Ahne 

 

-----Original Message-----

From: TechNet [mailto:[log in to unmask]] On Behalf Of Whittaker, Dewey
(EHCOE)

Sent: Wednesday, 19 September, 2007 14:53

To: [log in to unmask]

Subject: Re: [TN] Reliability of Class 1,2,3

 

I vote for Jack.

Dewey

 

-----Original Message-----

From: TechNet [mailto:[log in to unmask]] On Behalf Of Kathy Bergman

Sent: Wednesday, September 19, 2007 2:48 PM

To: [log in to unmask]

Subject: Re: [TN] Reliability of Class 1,2,3

 

Do you have the pictures of Roscoe that you can send me so I can show

Jennifer what he looks like so she can put in her vote for his new name.

 

 

-----Original Message-----

From: TechNet [mailto:[log in to unmask]] On Behalf Of Rob Strecker

Sent: Wednesday, September 19, 2007 2:29 PM

To: [log in to unmask]

Subject: Re: [TN] Reliability of Class 1,2,3

 

Let me rephrase the question.  

What is the benefit of moving from a class 1 to 2 or class 2 to 3?

 

Rob  

 

 

 

-----Original Message-----

From: Guy Ramsey [mailto:[log in to unmask]]

Sent: Wednesday, September 19, 2007 10:58 AM

To: 'TechNet E-Mail Forum'; Rob Strecker

Subject: RE: [TN] Reliability of Class 1,2,3

 

I don't think you are understanding the requirement. Do you have
J-STD-001? 

SPC is required if you are not going to do 100% inspection. If you are
doing

SPC then your quality team and statistical process results will tell you

what you need to do. 

 

A place you might look for help is the text, Statistical Process Control
for

Surface Mount Technology, by William S. Messina.

 

 

 

-----Original Message-----

From: TechNet [mailto:[log in to unmask]] On Behalf Of Rob Strecker

Sent: Wednesday, September 19, 2007 12:05 PM

To: [log in to unmask]

Subject: Re: [TN] Reliability of Class 1,2,3

 

Kat,

Actualy we are looking at ways to reduce inspection and still maintain a

class 2.  Does IPC have anything on method and frequency of inspection?

 

We may do something similar to what you have done, develop an inspection

matrix for our products to determine critical inspection points.  I
guess

the question is if we were to eleminate inspections completely (we would

still maintain 20% inspection end of oven, or some form of it) could we

still say we work to class 2, when we only look at the boards if they
fail

test?  How can we say we work to any class if we don't look at the
boards?

 

Rob

 

-----Original Message-----

From: TechNet [mailto:[log in to unmask]] On Behalf Of Kathy Kuhlow

Sent: Wednesday, September 19, 2007 9:00 AM

To: [log in to unmask]

Subject: Re: [TN] Reliability of Class 1,2,3

 

Rob, 

 

I would think a class change to reduce inspection is the wrong approach

since the class only has to do with acceptability criteria instead of
method

and frequency. 

 

Can you support reduced or implement inspection sampling plans? I have
also

been able to reduce inspection labor through critical and high risk
feature

identification so that labor is put towards those items needing more

attention. 

 

Can you provide more detail on the inspections that you want to reduce? 

 

Kat

 

-----Original Message-----

From: TechNet [mailto:[log in to unmask]] On Behalf Of Rob Strecker

Sent: Wednesday, September 19, 2007 9:15 AM

To: [log in to unmask]

Subject: [TN] Reliability of Class 1,2,3

 

I was wondering if there is any documentation out there stating the

reliability of products built to IPC class 1 compared to class 2 or 3?

We are a class 2 manufacture and are looking at reducing our
inspections,

however will this put us in the class 1 category by default if we only
catch

defects at functional test?  What inspection must we do in order to
maintain

class 2?

 

 

 

Thanks,

 

Rob

 

 

 

 

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