The list could go on and on ...
For Automatic Processes:
(1) Holes per square inch calculated as
total number of holes on board/total area of board.
(2) Number or percent of SMT parts.
(3) Number or percent of thru-hole parts.
(4) Number of layers.
(5) Conformal coating process.
(6) Autorouting or supervised routing.
For Manual Processes:
(7) Number of wire mods to be done.
(8) Number of cuts to be done
(9) socketing chips.
Or maybe much simpler, how about the number of individual
stations for each step in the board assembly process?
Let's use a simple example,
One board has
Paste, autoload chips, heat,
wash, dry, QC, done = 6 steps.
Another board has
Paste, autoload chips, heat, wash, dry, QC,
cuts, wire mods, socket chips, apply labels, QC,
temp test, QC, done = 12 steps.
Seems like that's more in line with what you want.
Say a board rated as a "20" because there are twenty
separate stations it must go through to be completed
could be far more complicated than a board rated as
a 6 for example. Then you could add in a time factor.
We have a board that requires the board to sit and
cure a glue for 4 hours. A 20 board that takes
90 minutes might be less "complicated than a 10 board
that takes 4 hours.
Just some random thoughts on a late night...
Regards, Doug McKean
----------
> From: Nick Guerra <[log in to unmask]>
> To: [log in to unmask]
> Subject: [TN] Design Complexity
> Date: Tuesday, January 13, 1998 3:34 PM
>
> I am currently in search for a metric to calculate the complexity of a
> design.
>
> Can anyone give me any ideas on what today's industry uses for a metric
> or formula to
> calculate design complexity?
>
>
> Thank you
>
> Nick Guerra
> [log in to unmask]
>
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