Just an addition to what has already been said...
What I used to do when I was "moonlightin'", was
charge by the pin in the basic quote (and the per/pin
price was modified with a complexity factor so you
don't get burned by those litle power supply boards
that are three times harder than the high pin count
digital boards)
THEN
charge PER HOUR for any changes from the point
they submit the change until you get back to where
you were when the change came in.
You can charge less per pin if you charge a HIGH
per hour change rate.
1) it puts it in their minds that it will cost far less as
long as they get their sh** together (and putting the
blame on them for schedule delays)
2) you will still make out good because they ALWAYS
change things.
win/win
p.s. I never expected to see a reference to Alice's
Restaurant in THIS forum... HA.
seeya,
Jack
On 1/23/07, George Patrick <[log in to unmask]> wrote:
>
> I don't know if there is a standard (I doubt it), but one thing that HAS
> to be included in any metric is "number of times the schematic changed
> after the job started." We are lucky enough that all changes have to be
> submitted thru our PLM software so we can extract this data. Not fair
> having us held to our quotes if the engineer can submit different
> schematics through the design cycle :)
>
> If you wanted to get really fancy you could save the eco.txt files after
> each netlist import and extract the number of adds/deletes for each
> revision. This would give you a better idea on how much time is wast..
> er.. expended doing, then redoing, then going back and re-redoing
> things.
>
> The data we track is Total Symbols, Mirrored Symbols, Total Pins, NC
> Pins, EIC, Area, Overall Dimensions, Density, panelized/Single, number
> of boards per panel, Material, Plating, RoHS compliance, Number of Nets,
> Etch Length, Total Vias, Vias per Connection, Total Layers/Plane Layers,
> Total Design Hours, Hours for each designer (for multiple-designer
> projects), Total Days on Hold, Schematic Revisions, Parts Added, Parts
> Deleted, Estimated Annual Usage, Engineer Comments, Designer Comments,
> and Phase of the Moon. With all these data, we can always point to
> something that has improved, and correctly point to the real cause if
> something else has diminished.
>
> FWIW, I also have automation that keeps an Access database full of this
> data, so we can extract charts and reports "with circles and arrows and
> a paragraph on the back explainin' what each one is" (apologies to Arlo
> Guthrie.)
>
> --
> George Patrick
> Tektronix, Inc.
> Central Engineering, EDS Applications Support
> P.O. Box 500, M/S 39-512
> Beaverton, OR 97077-0001
> * 503-627-5272 (voice) * 503-627-5587 (fax)
> http://www.tektronix.com http://www.pcb-designer.com
>
> "Off-Grid and Proud of it!"
>
>
> -----Original Message-----
> From: DesignerCouncil [mailto:[log in to unmask]] On Behalf Of
> Chris Ball
> Sent: Tuesday, January 23, 2007 12:07
> To: [log in to unmask]
> Subject: [DC] Productivity Indicators
>
>
> Hello Everyone-
>
> To satisfy an upper-management directive, we (global PCB layout group)
> must find a way to measure our productivity, so as to be able to prove
> we're improving.
>
> There are so many things that go into estimating a job... but at the
> moment I'm thinking that for input data, tracking Number of Layers,
> Total
> Connections, Pin Density, Total Hours, and Percent Carryover might be a
> good start for new jobs. I don't even have an idea of what to do for
> changes, as yet.
>
> A colleague thought there might be something documented in an IPC
> standard
> somewhere that addresses ways to calculate job complexity, etc. I
> haven't
> located it yet. If you know of this, know of other reference material
> for
> this sort of thing, or just want to tell me what I ought to do. I'd
> appreciate it (I think...).
>
> All the Best,
> -Chris
>
>
>
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