it depends, if it is large volume low mix - from design point of  
view, you need 92% 1st off (tooling not optimized, just for prove of  
concept market testing) prior to MFG, and qualification.  if you  
cannot achieve that, it not consider manufacturable (for 6 sigma at  
full production).  If it is low volume high mix, your design might be  
able to get away with 85% 1st off - assume it is repairable and  
thermal budgeted within the design (design allowable repair not over  
2X for example... if key components required repair, it consider  
scrape, for example).  you qualify using the repaired assembly to  
proof worst case reliability.  You still aiming 6 sigma at  
production... minimize the scrap is tightly linked with design for  
manufacturing - google the topic might help.  IMHO.  (at least that  
what I was taught by Sr.).
best of luck.
jk
On Apr 8, 2020, at 1:39 PM, Steve Gregory wrote:

> Hi Dick,
>
> Not an industry standard, but here's something that talks about  
> scrap (it's
> dated I know), but I don't know if anybody will fess up what their  
> scrap
> rate is other than in a real general sense...
>
> https://smtnet.com/? 
> fuseaction=search_submit_new&start_at=11&criteriaused=assembly 
> +scrap&collectionused=site_forum
>
>
> Steve
>
> On Wed, Apr 8, 2020 at 11:30 AM Gmail - Dick <[log in to unmask]>  
> wrote:
>
>> Does anyone know of any industry benchmarks on scrap?  If no  
>> benchmarks,
>> would anyone be able to share their scrap rate?
>>
>> We have some scrap and I’m sure others do too. What I’d like to  
>> know is
>> whether our scrap is in line with other manufacturers or not.
>>
>> Dick Krug
>> Sparton Electronics
>> [log in to unmask]
>
>
>
> -- 
> Steve Gregory
> Kimco Design and Manufacturing
> Process Engineer
> (208) 322-0500 Ext. -3133
>
> -- 
>
>
>
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