Mail*Link¨ SMTP               RE>[TECHNET] data needed

At 10:31 AM 9/4/97 +0300, you wrote:
>Hello,
>I am looking for data on two questions:
>1.  What is the average/acceptable yield of a PCB assembly line?

Hmmm.....Average yield we have broken into distinct categories based on
joint count and complexity level, so there is no simple response here. and,
I suppose "acceptable yield" would be slightly better yield then what was
bid, but obviously 100% would be even more acceptable!

>2.  What is the average up-time of an SMT line (do most lines work 7
>days-a week, 24 hours-a-day or what part of that time).

Normal uptime...this is not an easy answer. We normally run 5 days/week
three full shifts, but we occasionally run 7 days/week three full shifts as
needed to make schedule. Average uptime is, of course,a function of capacity
versus workload (ignoring machine downtime), if this is managed properly you
should have just enough busines to require occasional overtime. (don't we
all live in an ideal world, where we receive contracts for 60% of everything
we bid and one contract ends just as a new one is starting??) Something I've
found of interest is how other companies structure their work-weeks. I know
of some companies who have 4 day work weeks (10 hr days), but rotate shifts
so some have mondays off and some have fridays off, and also some work thru
the weekend days and have 3 weekdays off. It would be interesting to know of
other derivations of the standard 5day/40hour week....anyone else care to
comment on this?

I realize these answers are somewhat general, but so are the questions.

>
>I would be very grateful if you could provide such data or suggest
>appropriate sources for such information (including publications
>available for purchasing).
>
>Thank you.
>Daphne Raban
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>
>
----------------------------------
Jeff L. Hempton        phone: (219) 429-7335   Fax: (219) 429-4688
Boardshop Manufacturing Engineer                        Mail Stop: 25-31
Hughes Defense Communications
1010 Production Road, Fort Wayne, IN 46808-4106
Email: [log in to unmask]

"The man who rolls up his sleeves seldom loses his shirt."--Thomas Cowan