Re: [plcs-dex] Questions regarding Next_assembly_usage

[David Price <david.price@eurostep.com>]

Hmmm....  we may be talking about different things. R1 on a circuit board, as 
I understand it, is a logical thing - not a physical thing. That R1 
identifier was created in the ee logic design system long before things got 
physical. At least that's my recollection, although this was many years ago.

Either way, left from wheel or R1 are not a parts in an assembly. "Part" has a 
special meaning - or at least did in IBM and similar mfg orgs - of being the 
smallest physical component in a design. Of course, some of IBM's Parts were 
other people's assemblies but in no case was Part used to define a 
logical/functional item.

Hope this is helping,
DP

On Saturday 31 March 2007 09:43, Peter Bergström wrote:
> In a breakdown (although for this particular example I should use a
> physical breakdown, not a functional) you would instantiate different
> breakdown_elements for the different locations, but I don't think it is the
> same as to say that it's the left or right wheel in an assembly of a car,
> or that an electronic component should be place in a specific place (named
> location) on a circuit board. In the latter we are actually talking about
> parts in a parts assembly, where we have a requirement for how or where the
> assembly is done.
>
> You could do the same with a breakdown structure, but there you are not
> really talking about designed parts directly - you would have to realize
> the breakdown elements into parts to achieve the same.
>
> In some cases that is desired, e.g. early design and in-support, but for
> the detailed design phase it is necessary to be able to talk of the
> location of a part in context of its upper level part in a parts assembly,
> as well. At least, that is my understanding...
>
> Peter
>
>
> -----Original Message-----
> From: David Price [mailto:david.price@eurostep.com]
> Sent: den 31 mars 2007 01:50
> To: plcs-dex@lists.oasis-open.org
> Subject: Re: [plcs-dex] Questions regarding Next_assembly_usage
>
> On Friday 30 March 2007 19:48, Peter Bergström wrote:
> > Regarding location_indicator:
> > If this is just a hangover, what in PLCS is replacing it?
>
> I assumed a functional breakdowns covered this requirement. Is that wrong?
>
> Cheers,
> David
>
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