IPC-SM-782 3.5.3 discusses service life and Table 3.6 lists the service life typical of different usage categories.  Maybe this helps.  
 
+Tom
 

Thomas A. Frayda,  C.I.D.
Printed Circuit Board Designer
Detection Systems, Inc.
130 Perinton Parkway
Fairport, NY 14450-9199
www.detectionsys.com
TEL: 716-223-4060 x4365
FAX: 716-421-4263
E-mail: [log in to unmask]

-----Original Message-----
From: Norman Moseng [mailto:[log in to unmask]]
Sent: Monday, March 26, 2001 6:18 PM
To: [log in to unmask]
Subject: [DC] Product Lifecycle

Does anyone know what the lifecycle of the boards designed to IPC standards is? Is it stated
anywhere in the documentation?

Thanks Norm

-- 

                            \\\|///
                            ( 0 0 )
+-----------------------oOOO--(_)--OOOo---------------------------+   
|                                                                 |
| Norm Moseng                   Voice   630-378-6258              |
| Tellabs Inc.                  Fax     630-378-6721              |
| 1000 Remington Blvd.          Email   [log in to unmask] |
| Bolingbrook, Illinois 60440   MS      214                       |
|                               Cube    A231E                     |
|                                                                 |
|                          ooooO                                  |
|                          (   )   Ooooo                          |
+---------------------------\ (----(   )--------------------------+
                             \_)    ) /
                                   (_/