That brings up another point:  What's the OSHA regulations on manually
coating the boards.  If regulations prevent you from exposing your workers
to the process, then the machine is the only way to go and you have no
choice.  Payback is important, but the human exposure to those chemicals or
process my preclude you using the manual methods.

Ken Stephens, President
CAD 2 CAM, Inc.
http://www.cad2cam.com
503-246-4692

> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]]On Behalf Of Timothy Reeves
> Sent: Wednesday, December 15, 1999 10:35 AM
> To: [log in to unmask]
> Subject: Re: [TN] econ 101 for engineers
>
>
> I think you should compare the cost of doing it manually (not the cost of
> outsourcing to the board builder) with the cost of buying and using the
> machine, so the savings is only the $2 per board you estimated,
> not $12 per
> board. Unless you're being forced to stop coating manually...you have to
> compare what's the best you can do (economically) without the machine to
> what you can do with the machine. That gives payback in about nine
> years...probably not acceptable.
> (just my $.02.)
> Tim Reeves
>
> > ----------
> > From:         Bob Sechriest
> > Sent:         Wednesday, December 15, 1999 8:36 AM
> > Subject:      econ 101 for engineers
> >
> > Need some very basic advise on cost calculations for equipment purchace
> >
> > Trying to justify the purchace of a conformal coating machine
> for several
> > of our PCB assemblies. We have been performing the operation
> manually at a
> > cost of  $10 per board less than that quoted by our board builder. My
> > estimate is that by automating we can reduce the price per board another
> > $2 below the quote. So for a $50000 machine, we can recover our
> investment
> > by producing (50000/12) = 4167 boards. This gives a payback in
> <18months.
> > Sounds great! also sounds too easy. Am I missing something?
> >
> > Thanks in advance!!!!!!!!!
> > Bob
> >
>
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