Hi Rick
I think the answer is going to depend on a couple of things
 - how do you control inventory
 - how do you bulk issue parts
 - how much detail do you want to track the usage of parts?

We use SAP for our MRP system, and have two BOMs.  One BOM is the bulk issue stuff - SMT parts, wire, stuff that goes out to the production floor in greater quantity than is required for the job.  The other BOM is the "kit" issue, which is material that is picked - the PWB, through-hole parts, mechanical stuff.  

regards, 
  
Graham Collins 
Halifax Production Engineering 
L-3 communications Electronic Systems 
(902) 873-2000 ext. 6215 

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Smith, Rick
Sent: Tuesday, November 30, 2010 11:30 AM
To: [log in to unmask]
Subject: [TN] Separate BOM's for Same Assembly

Hi Folks,

Engineering currently produces two separate BOM's for a single board assembly, 1 for SMD's and the other for PTH parts which are subsequently entered into the ERP system by Doc Control. Without going into a lot of detail I understand the reasons for the separate BOM's are related to production logistics, routings and cost.

I am told this is typical in the industry for OEM's and would like to either corroborate or debunk this with your responses. I am trying to determine if the 2 BOM system is necessitated by ERP limitations or the result of a misguided approach to process development.

Does anyone use the two BOM approach for a single board assembly?

Thanks!

Regards,
Rick


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