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Subject:	Re: How are PCB & Assembly manufacturers measuring scrap?
From:	"[log in to unmask]" <[log in to unmask]>
Reply To:	TechNet E-Mail Forum <[log in to unmask]>, [log in to unmask]
Date:	Wed, 19 Apr 2006 11:50:49 -0400
Content-Type:	text/plain
Parts/Attachments:	text/plain (49 lines)

Brian Guidi wrote:

>Good morning folks,
>
>We've had some lively discussions regarding the best ways to measure scrap
>within a manufacturing operation. What are some common ways of
>characterizing and measuring accurate scrap levels?
>
>Also, I know this next one is a loaded question but I'll fire it off
>anyway. When scrap is measured as a percentage of sales, what values are
>typical within this industry? One percent? Five percent? Is there a
>significant difference between the value one would anticipate for a board
>fab shop versus an assembly operation?
>
>Brian Guidi
>R&D/Quality Systems Specialist
>Teledyne Printed Circuit Technology
>Tel: (603) 889-6191  X:310
>Fax: (603) 886-2977
>E-mail: [log in to unmask]
>
>Visit us @ http://www.tetpct.com
>
We're an assembly operation and measure raw $$ amounts of scrap. We set
a goal of 20% reduction in scrap/year (we started off with a lot of $$
thrown out in the dustbin). Now that we are down below $3K/ month, we
will be starting to report as a % of total production,although in
previous places scrap was often reported as a % of sales. What's typical
would probably depend on the particular normal yield of the item you are
producing, as something like wafer dies might have a higher scrap rate
than 2 layer PCBs.

John Burris
Mfg. Eng. Mgr.
Automated Logic/UTEC
770.795.4827 (O)
770.795.3527 (F)
[log in to unmask]

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