Na... that's what happens when you multiply the hours required by Pi.
(3.14159...)
LOL
(just kidding of course)
Bill Brooks - KG6VVP
PCB Design Engineer, C.I.D.+, C.I.I.
Tel: (760)597-1500 Ext 3772 Fax: (760)597-1510
Datron World Communications, Inc.
_______________________________________
San Diego Chapter of the IPC Designers Council
Communications Officer, Web Manager
http://dcchapters.ipc.org/SanDiego/
http://pcbwizards.com
-----Original Message-----
From: Ed Murphy [mailto:[log in to unmask]]
Sent: Friday, May 20, 2005 1:33 PM
To: [log in to unmask]
Subject: Re: [DC] How would you quote this board?
All those decimals... must be that floating point processor again :-)
-----Original Message-----
From: DesignerCouncil [mailto:[log in to unmask]] On Behalf Of
Handley, William
Sent: Friday, May 20, 2005 4:33 PM
To: [log in to unmask]
Subject: Re: [DC] How would you quote this board?
Sight unseen My formulas guess would be:
1071.4285714285714285714285714286 hours
(I've added time in there for coffee and other bodily functions.)
Bill Handley CID+
Sr. CAD eng.
Intel Corp.
Chandler, Az 85226
-----Original Message-----
From: DesignerCouncil [mailto:[log in to unmask]] On Behalf Of Gary
Crowell
Sent: Friday, May 20, 2005 10:24 AM
To: [log in to unmask]
Subject: [DC] How would you quote this board?
Since we are a 'captive shop' here at Micron, we have only a very shaky
frame of reference with which to judge how our work compares with other
layout designers. One of our designers was worried that we (and
himself, specifically) might be falling behind what might be considered
'standard' in the industry. I was hoping some of you might respond with
the man-hour estimate you might quote for the following board:
2800 components; top & bot placement allowed, few placement restrictions
~20,000 pads/pins, 95% SMT
Usable area: 130 in2
Routing layers: 8 internal routing, top&bottom
Plane layers: 10 power/gnd planes; 6 voltages distributed on split
planes
Trace/space: 4/6 mil
Via drill/pad: 10/20 mil
4200 nets; ~80% involve matched lengths and/or differential routing
Major components: 1020 ball 1mm BGA, 1508 ball 1mm BGA, 1072 ball 1.27mm
BGA, 2x SODIMM sockets, 12 HD connectors
All digital; no analog
A full-feature SPECCTRA router is available.
Thanks
Gary Crowell CID
Micron Technology
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