I agree with Bev....
Avoid rework as a standard process in the manufacturing line... 
Reliability of the finished product might not the be the main issue but 
consider the costs of such process definition (lead-time vs. capital 
costs, resources vs. added value to a product and so on)
What I mean is that if the process is not demanded in some way from your 
customer and don't add value to a product, the process itself is 
excessive.
And Yes! The process control is the key word in this relation. 
If you have a process control that gives you early alarms, reduction of 
the rework is a direct consequence... But to come there, process 
requirements needs to be satisfied....

Anyhow, the goal is fast and reliable production to reasonable costs and 
quality and the only honest way to get good customers if you are in the 
contract manufacturing branch.

Rework itself is invented for two reasons... Either to cover up a lack of 
quality or to make money.... I would always choose the second alternative. 
:) 

Good luck,
Sasha
 
*************************************************************************
Sasha Miladinovic - Production Engineering 
Amersham Biosciences, PCB Production, Umeå
Tel:      +46 (0) 90 150 232
Fax:     +46 (0) 90 138 372
E-mail: [log in to unmask]
*************************************************************************





John Parsons <[log in to unmask]>
Sent by: TechNet <[log in to unmask]>
2003-12-03 20:51
Please respond to "TechNet E-Mail Forum."; Please respond to John Parsons

 
        To:     [log in to unmask]
        cc: 
        Subject:        [TN] Touchup - We don't need no stinkin' touchup! Or do we?


Greetings all,

I have moved on from my old life in the fabrication business to learn some
new things in the contract manufacturing sector.  My first question to the
group in this new role is on the subject of touch-up as a standard process
step after smt placement and reflow.  Does everyone do this or can it be
eliminated by process control during placement and reflow?  I personally
don't much care for non-value added processes but was just wondering what
the general feeling out there was.

Regards
John Parsons

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