A good book on the subject is:

"Engineering Documentation Control Handbook" by Frank Watts, ISBN
0-8155-1342-9

His strong recommendation on part number significance is to have a
'minimally significant' or non-significant part number; because
ultimately, over time, any numbering system will break down.  Find the
parts by searching on standard descriptive name, modifier(s), and
value(s).

The book has good info on handling revisions, ECO's, BOM's, etc.


Gary Crowell
Micron Technology

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