Questions on reference designators ?

For those of you that have them screened or otherwise marked on you board;
what do you use reference or component designators for in today's technology?
 I have found a few people who use them on a unloaded board to check
first-piece if no overlay is present h them.  Some say it is for orientation
and others say it is for rework or field repair.  With cost of screening
reference designators on the board running between 2 and 8% of the cost,
there must be a better reason       

Phil Hinton 
[log in to unmask]

The mail list is provided by IPC using SmartList v3.05
To unsubscribe from this list at any time, send a message to:
[log in to unmask] with <subject: unsubscribe> and no text.