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Subject: Re: The saga on "manage identification"


I agree completely. The standard only states "...provide unambiguous 
identification..." without stating how this unambiguity (sic) should be 
achieved. The capability, on the other hand, does specify that the 
triplet [id,class,org] must be unique, which is where such a restriction 
belongs. In the future a new id capability could conceivably be defined 
with some alternate way of achieveing uniqueness.

If I do not read this wrong it confirms my earlier longwinded argument,
i.e. do not restrict PLCS, put the restrictions in DEX/capabilities.

Regards,
Per-Åke

Gordon Robb wrote:
> 
> Gentlefolk
> Isn't it time to remind ourselves of what the PLCS AP 239 definition of 
> "manage identification" states
> 
> "Manage identification
> action to provide unambiguous identification of all elements, and 
> versions, of the product or support system to which reference needs to 
> be made, identification of interfaces between elements, the necessary 
> assembly, and other breakdowns structures, required to manage the 
> product through life and definition of the information to be held for 
> each type of product and support system element
> 
> NOTE    This activity occurs throughout the product life cycle and is 
> the basis of management of configuration change and configuration status 
> accounting of a product and all constituent configuration items. The 
> purposes and benefits of this activity include:
> 
> ·       determining the structure (hierarchy) of a product and the 
> organization and relationships of configuration documentation and other 
> product information;
> 
> ·       documentation of the performance, interface and other attributes 
> of a product;
> ·       determination of the appropriate level of identification marking 
> of product and documentation;
> ·       unique identification of a product or component part of a product;
> ·       unique identification of the technical documents describing the 
> product;
> ·       modification of identification of product and documents to 
> reflect incorporation of change;
> ·       distinction between product versions;
> ·       correlation of document revision level to product version;
> ·       correlation of a PIF to related user or maintenance instructions 
> at the configuration item level."
> 
> That definition is catered for by Capability (C001):- 
> assigning_identifiers which states in its introduction
> "The purpose of this capability is to assign identifiers to entities 
> within the model that may be the subject of identification. There are 
> three components to identification;
> 
>         the identifier and its assignment
>         the organization that owns the identifier
>         the meaning of the identifier (e.g. serial number) as provided 
> by the classification
> The approach adopted here is compatible with that provided in the DOD 
> Memorandum "The Department of Defence Guide to Uniquely Identifying 
> Items, Version 1.3" dated November 25th, 2003. See 
> (http://www.acq.osd.mil/uid) for the source. This memorandum applies to 
> high value tangible assets (such as an aircraft). However, the approach 
> here is much broader than the DoD approach and covers none tangible 
> assets (such as a maintenance task).
> 
> NOTE    The identifier shall be unique within the organization that owns 
> it.
> 
> EXAMPLE    A DUNS code or a CAGE Code is an example of an identification 
> that can be assigned to an organization.
> 
> EXAMPLE    A Part Number is an example of an identification that can be 
> assigned to the design of a Part.
> 
> EXAMPLE    A Serial Number is an example of an identification that can 
> be assigned to a physical instance of a Part (a Product_as_individual)
> 
> The methodology of  'References to Identification_Assignment' is 
> depicted in the attachment.
> 
> Whilst the modellers may wish to battle out their preferences I would 
> like to state that the way DEX 1 and DEX 8 are compiled (noting there 
> will be fine tuning to take place post the revision to module 1164 PAI 
> and possible 1251 Interface) meet the business requirements for managing 
> the id.
> 
> The bottom line is that a serial number allocated by the 'OEM' is a 
> through life serial number that provides unambiguous identification and 
> traceability of the asset if required. Through configuration changes in 
> its life the PIF part number//section/reference number//National or NATO 
> stock number will change BUT the serial number remains the same.
> 
> regards
> 
> Gordon
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> -----Original Message-----
> From: Per-Åke Ling [mailto:per-ake.ling@eurostep.com]
> Sent: 26 October 2004 18:55
> To: Tim Turner
> Cc: Rob Bodington; john.dunford@eurostep.com; 'Tim King';
> torirgen@eunet.no; trine.hansen@dnv.com; plcs@lists.oasis-open.org;
> leif.tonning@dnv.com; 'Leif Gyllström'
> Subject: Re: [plcs] Workshop #2 - Synchronise work on DEXs and reference
> data between PLCS pilots and OASIS/PLCS
> 
> 
> Hmmm, yes. But, it would be a headache to ensure uniqueness in the model
> iteself, as you pointed out it should be a business issue. If specified
> at all it should be in a DEX, not in the model. The reason for this
> being that it is very difficult to define what constitutes uniqueness,
> consider the following cases:
> 
> 1. same id, different organisations
> 2. same id, different effectivity
> 3. same id, different classification
> 4. same id, different context
> ...
> 
> So, given that identification is multidimensional, what constraints can
> the model enforce that would sit comfortably with every implementation ?
> 
> On the other hand, considering the DEX as a well defined subset and
> restriction, it could well be that for a specific area of applicability
> of PLCS (i.e. the DEX) a specific rule could be specified enforcing some
> rule of uniqueness.
> 
> To summarize, I believe that PLCS (the model) is fine as it is with all
> its flexibility (and warts), the restrictions should instead be
> specified in the DEX. Since probably nobody would claim conformance with
> PLCS as a whole (a somewhat nebulous claim) this is not a problem, I
> rather see an application claiming conformance with e.g. DEX #1, #7 and
> #13 (or whatever). This will achieve the constraints without restricting
> the model itelf, and thereby keeping it more futureroof.
> 
> Regards,
> Per-Åke
> 
> Tim Turner wrote:
>  > Per,
>  >
>  > I can see your point. The contents of the identifier is a business 
> issue,
>  > not a modelling one.
>  >
>  > However, if (are?) we responsible for enforcing 
> consistency/uniqueness in
>  > the model, then we probably need some rules. Any global rules would 
> need to
>  > be established at the capability/dex level - not the PLCS schema level.
>  >
>  > I think the implementors will be cursing us if we give them 
> conflicting or
>  > ambiguous requirements that can be interpreted differently resulting in
>  > different populations of the data - so we need to strike the right 
> balance.
>  >
>  > I think we need to ensure at least consistency in the data. The real
>  > question then is how restrictive do the rules need to be for this. I was
>  > agreeing with Rob, in suggesting that we need to ensure that there is an
>  > identification of the P.A.R, and (going further) that there should 
> alsways
>  > be at least one identifier that is classified as a 'serial 
> identification
>  > code' (and owned by an Org'n).
>  >
>  > Whether we go further & ensure that the content of that identifier is 
> unique
>  > at all (I presume within the Dex), across all P.A.R's, P.A.P's and/or 
> all
>  > Parts is the issue.
>  >
>  > So the next question, I hinted at earlier, is whether we as 
> developers of
>  > the model are responsible for *ensuring* uniqueness of the data, or 
> do we
>  > pass on that problem to the implementors?
>  >
>  > kind regards,
>  > Tim
>  >
>  > NB. I am not certain that this is an issue from both the integration and
>  > data exchange uses of plcs (but certainly from the latter).
>  >
>  >
>  >
>  > ----- Original Message -----
>  > From: "Per-Åke Ling" <Per-Ake.Ling@eurostep.com>
>  > To: "Rob Bodington" <rob.bodington@eurostep.com>
>  > Cc: "'Tim Turner'" <timturner11@bellsouth.net>; 
> <john.dunford@eurostep.com>;
>  > "'Tim King'" <tmk@lsc.co.uk>; <torirgen@eunet.no>; 
> <trine.hansen@dnv.com>;
>  > <plcs@lists.oasis-open.org>; <leif.tonning@dnv.com>; "'Leif Gyllström'"
>  > <leif.gyllstrom@aerotechtelub.se>
>  > Sent: Tuesday, October 26, 2004 12:24 PM
>  > Subject: RE: [plcs] Workshop #2 - Synchronise work on DEXs and reference
>  > data between PLCS pilots and OASIS/PLCS
>  >
>  >
>  >
>  >>I fail to see this as a PLCS problem. PLCS provides a
>  >>mechanism for identification, to be meaningful this should at least
>  >>be qualified by classification and an organisation claiming
>  >>ownership, i.e. the PLCS is flexible and rich enough to handle
>  >>any identification scheme.
>  >>
>  >>Whether or not NSN numbers are unique is surely a problem irrespective
>  >>of PLCS, i.e. the organisation assigning the numbers will have
>  >>problems regardless.
>  >>
>  >>On the other hand, I am not sure global rules are a good idea unless
>  >>one can ascertain that it will always be true for any conceivable use
>  >>of PLCS that an identification always will have an organisation (and
>  >>likewise for other rules). I am not happy about restricting the PLCS
>  >>schema this way, but a DEX (or capability) could certainly impose
>  >>such a restriction.
>  >>
>  >>Regards,
>  >>Per-Åke
>  >>
>  >>
>  >>Quoting Rob Bodington <rob.bodington@eurostep.com>:
>  >>
>  >>
>  >>>We can't stop someone using an NSN as a serial number . but
>  >>>
>  >>>If an identifier is a Serial number, then the identification_assignment
>  >>>should
>  >>>be classified as such.
>  >>>
>  >>>If the identifier is an NSN the identification_assignment should be
>  >>>classified
>  >>>as an NSN - not a serial number.
>  >>>
>  >>>
>  >>>
>  >>>
>  >>>
>  >>>Regards
>  >>>Rob
>  >>>
>  >>>-------------------------------------------
>  >>>Rob Bodington
>  >>>Eurostep Limited
>  >>>Web Page:  <http://www.eurostep.com> http://www.eurostep.com
>  >>><http://www.share-a-space.com> http://www.share-a-space.com
>  >>>Email: Rob.Bodington@eurostep.com
>  >>>Phone: +44 (0)1454 270030
>  >>>Mobile: +44 (0)7796 176 401
>  >>>
>  >>>-----Original Message-----
>  >>>From: Tim Turner [mailto:timturner11@bellsouth.net]
>  >>>Sent: 26 October 2004 16:14
>  >>>To: Rob Bodington; john.dunford@eurostep.com; 'Tim King';
>  >>>torirgen@eunet.no
>  >>>Cc: trine.hansen@dnv.com; plcs@lists.oasis-open.org;
>  >>>leif.tonning@dnv.com; 'Leif
>  >>>Gyllström'
>  >>>Subject: Re: [plcs] Workshop #2 - Synchronise work on DEXs and 
> reference
>  >>>data
>  >>>between PLCS pilots and OASIS/PLCS
>  >>>
>  >>>
>  >>>
>  >>>Y'all,
>  >>>
>  >>>
>  >>>
>  >>>I tend to agree with Rob (the heretic!) - since I also recommended the
>  >>>use of
>  >>>global rules to help with consistency and to enforce what is being
>  >>>described by
>  >>>the Dexs. What is the point of not doing what we preach?
>  >>>
>  >>>
>  >>>
>  >>>The validation of a serial number is not something that the model
>  >>>should
>  >>>enforce. However, the Dexs state what type of reference data should be
>  >>>associated with an identifier of a Product_as_realized.
>  >>>
>  >>>
>  >>>
>  >>>What worries me is the subsequent issue; that if a NSN is used in place
>  >>>of a
>  >>>serial number (but classified as a serial number) -  is the issue of
>  >>>uniqueness.
>  >>>
>  >>>
>  >>>
>  >>>
>  >>>If this situation can occur once, then the same NSN may be used
>  >>>elsewhere - also
>  >>>as a serial number. Hence we may have two (or more) identical
>  >>>identifiers (NSN)
>  >>>both classified as serial numbers. Will this not present a bigger
>  >>>problem?
>  >>>
>  >>>
>  >>>
>  >>>regards,
>  >>>
>  >>>Tim
>  >>>
>  >>>----- Original Message -----
>  >>>
>  >>>From: Rob <mailto:rob.bodington@eurostep.com>  Bodington
>  >>>
>  >>>To: john.dunford@eurostep.com ; 'Tim King' <mailto:tmk@lsc.co.uk>  ;
>  >>>torirgen@eunet.no
>  >>>
>  >>>Cc: trine.hansen@dnv.com ; plcs@lists.oasis-open.org ;
>  >>>leif.tonning@dnv.com ;
>  >>>'Leif Gyllström' <mailto:leif.gyllstrom@aerotechtelub.se>
>  >>>
>  >>>Sent: Tuesday, October 26, 2004 10:21 AM
>  >>>
>  >>>Subject: RE: [plcs] Workshop #2 - Synchronise work on DEXs and 
> reference
>  >>>data
>  >>>between PLCS pilots and OASIS/PLCS
>  >>>
>  >>>
>  >>>
>  >>>John
>  >>>
>  >>>I disagree.
>  >>>
>  >>>The rule will say that there must be at least one identification
>  >>>assigned to
>  >>>product_as_realized.
>  >>>
>  >>>
>  >>>
>  >>>I do not see how you can represent a product_as_realized without
>  >>>identifying it.
>  >>>The id attribute are legacy step which we would like to get rid of.
>  >>>
>  >>>
>  >>>
>  >>>I am not saying that the identification must be a serial number. Just
>  >>>that you
>  >>>must identify the product_as_realized. Reference data will tell you 
> what
>  >>>type
>  >>>of identifier it is.
>  >>>
>  >>>
>  >>>
>  >>>I was thinking of doing the same to Part as well.
>  >>>
>  >>>
>  >>>
>  >>>Regards
>  >>>Rob
>  >>>
>  >>>-------------------------------------------
>  >>>Rob Bodington
>  >>>Eurostep Limited
>  >>>Web Page:  <http://www.eurostep.com> http://www.eurostep.com
>  >>><http://www.share-a-space.com> http://www.share-a-space.com
>  >>>Email: Rob.Bodington@eurostep.com
>  >>>Phone: +44 (0)1454 270030
>  >>>Mobile: +44 (0)7796 176 401
>  >>>
>  >>>-----Original Message-----
>  >>>From: John Dunford [mailto:esukpc15@gotadsl.co.uk]
>  >>>Sent: 25 October 2004 15:05
>  >>>To: 'Rob Bodington'; 'Tim King'; john.dunford@eurostep.com;
>  >>>torirgen@eunet.no
>  >>>Cc: trine.hansen@dnv.com; plcs@lists.oasis-open.org;
>  >>>leif.tonning@dnv.com; 'Leif
>  >>>Gyllström'
>  >>>Subject: RE: [plcs] Workshop #2 - Synchronise work on DEXs and 
> reference
>  >>>data
>  >>>between PLCS pilots and OASIS/PLCS
>  >>>
>  >>>
>  >>>
>  >>>Rob, please don't apply a rule to serial id.  I like Tim's explanation
>  >>>of how
>  >>>things will work for the situation when reference is made to realized
>  >>>parts by
>  >>>"improper" means!  PLCS must recognise that in many current
>  >>>applications,
>  >>>references need to be made to realized parts without serial ids.  This
>  >>>is done
>  >>>in various ways including using NSNs, or Slot, or Part
>  >>>numbers/descriptions
>  >>>(e.g. when reporting a Fault, or hours run, on the Starboard Outer Feed
>  >>>Pump).
>  >>>
>  >>>
>  >>>
>  >>>I have a little more sympathy with a global rule on organization
>  >>>assignment,
>  >>>although this again may require such data to be generated by a
>  >>>translator, if
>  >>>the organization id is implicit within a given legacy system.
>  >>>
>  >>>
>  >>>
>  >>>
>  >>>
>  >>>John Dunford,
>  >>>
>  >>>Eurostep Limited,
>  >>>
>  >>>25, Chaucer Road, BATH BA2 4QX, UK
>  >>>
>  >>>Tel: +44 1225 789347
>  >>>
>  >>>Mobile: +44 0797 491 8202
>  >>>
>  >>>www.eurostep.com <http://www.eurostep.com/>
>  >>>
>  >>>www.share-a-space.com <http://www.share-a-space.com/>
>  >>>
>  >>>
>  >>>
>  >>>-----Original Message-----
>  >>>From: Rob Bodington [mailto:rob.bodington@eurostep.com]
>  >>>Sent: 26 October 2004 12:24
>  >>>To: 'Tim King'; john.dunford@eurostep.com; torirgen@eunet.no
>  >>>Cc: trine.hansen@dnv.com; plcs@lists.oasis-open.org;
>  >>>leif.tonning@dnv.com; 'Leif
>  >>>Gyllström'
>  >>>Subject: RE: [plcs] Workshop #2 - Synchronise work on DEXs and 
> reference
>  >>>data
>  >>>between PLCS pilots and OASIS/PLCS
>  >>>
>  >>>I sort of agree with you Tim. However, I am considering writing a 
> global
>  >>>rule (a
>  >>>heretic statement I know) that forces a product_as_realised to have an
>  >>>identification_assignment to carry the serial number. I was also
>  >>>considering a
>  >>>rule to force the assignment of an organiztion assignment to to the
>  >>>identification assignment.
>  >>>
>  >>>
>  >>>
>  >>>Regards
>  >>>Rob
>  >>>
>  >>>-------------------------------------------
>  >>>Rob Bodington
>  >>>Eurostep Limited
>  >>>Web Page:  <http://www.eurostep.com> http://www.eurostep.com
>  >>><http://www.share-a-space.com> http://www.share-a-space.com
>  >>>Email: Rob.Bodington@eurostep.com
>  >>>Phone: +44 (0)1454 270030
>  >>>Mobile: +44 (0)7796 176 401
>  >>>
>  >>>-----Original Message-----
>  >>>From: Tim King [mailto:tmk@lsc.co.uk]
>  >>>Sent: 26 October 2004 11:11
>  >>>To: 'john.dunford@eurostep.com'; torirgen@eunet.no
>  >>>Cc: trine.hansen@dnv.com; plcs@lists.oasis-open.org;
>  >>>leif.tonning@dnv.com; 'Leif
>  >>>Gyllström'; 'Rob Bodington'
>  >>>Subject: RE: [plcs] Workshop #2 - Synchronise work on DEXs and 
> reference
>  >>>data
>  >>>between PLCS pilots and OASIS/PLCS
>  >>>
>  >>>
>  >>>
>  >>>Dear John,
>  >>>
>  >>>This business practice is not an issue for the PLCS model because we
>  >>>just map
>  >>>things where they should go (i.e. the NSN is mapped to the
>  >>>Identification_assignment for the Resource_item).  We do not need to
>  >>>autogenerate anything.  The Product_as_realized instance stands in its
>  >>>own right
>  >>>and needs no Identification_assignment (i.e. there is no serial number
>  >>>to
>  >>>distinguish).  If the legacy systems requires the "identifier" then one
>  >>>can
>  >>>trace back through to the Resource_item that applies and find the NSN
>  >>>there.
>  >>>This means "we do not have a serial number for this part of the 
> realised
>  >>>ship
>  >>>but we know it is on there (never needing tracking) and we are using 
> the
>  >>>NSN as
>  >>>a proxy identifier".  (Of course, I am not sure if the system has a 
> flag
>  >>>to
>  >>>indicate which serial numbers are real and which are NSNs - but that
>  >>>could be
>  >>>determined by intelligent inspection.)
>  >>>
>  >>>Cheers,
>  >>>Tim.
>  >>>
>  >>>
>  >>>
>  >>>-----Original Message-----
>  >>>From: John Dunford [mailto:esukpc15@gotadsl.co.uk]
>  >>>Sent: 25 October 2004 10:49
>  >>>To: 'Tim King'; torirgen@eunet.no
>  >>>Cc: trine.hansen@dnv.com; plcs@lists.oasis-open.org;
>  >>>leif.tonning@dnv.com; 'Leif
>  >>>Gyllström'; 'Rob Bodington'
>  >>>Subject: RE: [plcs] Workshop #2 - Synchronise work on DEXs and 
> reference
>  >>>data
>  >>>between PLCS pilots and OASIS/PLCS
>  >>>
>  >>>
>  >>>
>  >>>Tim, the problem that Tor refers to is the opposite of the one you 
> cite.
>  >>> He is
>  >>>not facing an application which uses its own, special, identifiers 
> for a
>  >>>part.
>  >>>He is facing one where the NSN has been mis-used for this purpose.  
> This
>  >>>is OK
>  >>>if everyone know this is what has been done (as the host system users
>  >>>probably
>  >>>do), but it could cause significant problems, in a wider context, if
>  >>>the
>  >>>practice is spread (by a PLCS DEX) to a broader community.
>  >>>
>  >>>I suspect we will encounter many such examples of "id confusion" in
>  >>>current
>  >>>systems  (not least in SSDD and UMMS, where I suspect the famous ACCREF
>  >>>Number
>  >>>means different things to different people).
>  >>>
>  >>>So, how should PLCS handle this?   If we are all agreed that NSN's
>  >>>should be
>  >>>recorded by PLCS as identifiers of classes of resource_items (and it
>  >>>seems we
>  >>>are), how should we deal with the mapping when a particular application
>  >>>uses an
>  >>>NSN to identify a product_as_realized?  Should the DEX translator auto
>  >>>generate
>  >>>a new unique id for the p_a_r, and relate the NSN to the p_a_r, as the
>  >>>id of the
>  >>>associated resource_item; or is there another way of handling this?
>  >>>
>  >>>Forgive me if I'm am treading ground already resolved, but I suspect
>  >>>"id
>  >>>confusion" may well be the biggest problem that PLCS implementers will
>  >>>face, and
>  >>>a consistent, well document approach will be needed.
>  >>>
>  >>>John Dunford,
>  >>>Eurostep Limited,
>  >>>25, Chaucer Road, BATH BA2 4QX, UK
>  >>>Tel: +44 1225 789347
>  >>>Mobile: +44 0797 491 8202
>  >>>www.eurostep.com
>  >>>www.share-a-space.com
>  >>>
>  >>>-----Original Message-----
>  >>>From: Tim King [mailto:tmk@lsc.co.uk]
>  >>>Sent: 20 October 2004 10:09
>  >>>To: 'torirgen@eunet.no'
>  >>>Cc: 'john.dunford@eurostep.com'; trine.hansen@dnv.com;
>  >>>plcs@lists.oasis-open.org; leif.tonning@dnv.com; Leif Gyllström
>  >>>Subject: RE: [plcs] Workshop #2 - Synchronise work on DEXs and 
> reference
>  >>>data
>  >>>between PLCS pilots and OASIS/PLCS
>  >>>
>  >>>
>  >>>
>  >>>Yes.  But the example you give just means that for the initial
>  >>>allocation of the
>  >>>NSN there is a one-to-one correspondence.  If someone else finds a new
>  >>>use for
>  >>>the form, fit and function that the part_version embodies then the NSN
>  >>>is the
>  >>>common link across those different applications and potentially
>  >>>eventual
>  >>>different manufacturings.  In principle, the NSN only enables supply
>  >>>rationalisation but can not really force people not to find a way to
>  >>>distinguish
>  >>>their own designs from others.
>  >>>
>  >>>Cheers,
>  >>>Tim.
>  >>>-----Original Message-----
>  >>>From: torirgen@eunet.no [mailto:torirgen@eunet.no]
>  >>>Sent: 19 October 2004 09:44
>  >>>To: Tim King
>  >>>Cc: 'john.dunford@eurostep.com'; trine.hansen@dnv.com;
>  >>>plcs@lists.oasis-open.org; leif.tonning@dnv.com; Leif Gyllström
>  >>>Subject: RE: [plcs] Workshop #2 - Synchronise work on DEXs and 
> reference
>  >>>
>  >>>data between PLCS pilots and OASIS/PLCS
>  >>>
>  >>>
>  >>>
>  >>>John,
>  >>>Well in the case of the Norwegian Frigates the NSN applies sometimes to
>  >>>
>  >>>part_version, and even worse the part_version only apply to ONE ship...
>  >>>
>  >>>but in principle I tend to agree with you.
>  >>>Best regards,
>  >>>Tor Arne
>  >>>
>  >>>
>  >>>
>  >>>
>  >>>>I completely support John's comments.  We reviewed this at Seattle and
>  >>>
>  >>>>when
>  >>>>I have time, I should be writing this up ... ideally as a capability.
>  >>>
>  >>>>Cheers,
>  >>>>Tim.
>  >>>>
>  >>>>-----Original Message-----
>  >>>>From: John Dunford [mailto:esukpc15@gotadsl.co.uk]
>  >>>>Sent: 18 October 2004 12:02
>  >>>>To: Trine.Hansen@dnv.com; plcs@lists.oasis-open.org
>  >>>>Cc: Leif.Tonning@dnv.com; Leif Gyllström
>  >>>>Subject: RE: [plcs] Workshop #2 - Synchronise work on DEXs and
>  >>>
>  >>>reference
>  >>>
>  >>>>data between PLCS pilots and OASIS/PLCS
>  >>>>
>  >>>>
>  >>>>Trine, in briefly reviewing you PowerPoint and spreadsheet I was
>  >>>
>  >>>surprised
>  >>>
>  >>>>to see no mention of the entity Resource_item.  Apart from anything
>  >>>
>  >>>else
>  >>>
>  >>>>this is the key to modelling NATO STOCK NUMBERS, which are identifiers
>  >>>
>  >>>of
>  >>>
>  >>>>resource_items.  The whole Class, Group, Item structure is one set of
>  >>>
>  >>>>ready
>  >>>>made Reference Data, applicable to this entity.  The NATO RD should
>  >>>
>  >>>not be
>  >>>
>  >>>>applied to part_version, because an NSN may be satisfied by any number
>  >>>
>  >>>of
>  >>>
>  >>>>part_versions from different suppliers.
>  >>>>
>  >>>>Indeed the resource_item/managed_resource area probably deserve more
>  >>>>attention from the DEX community than it has so far received.  These
>  >>>>concepts were specifically designed to provide somewhere to hold the
>  >>>
>  >>>large
>  >>>
>  >>>>set of information which applies to items within an Inventory/Stock
>  >>>>management environment, and not to a specific part_version, and I am
>  >>>
>  >>>sure
>  >>>
>  >>>>you'll find plenty of this across the NDLO!
>  >>>>
>  >>>>John Dunford,
>  >>>>Eurostep Limited,
>  >>>>25, Chaucer Road, BATH BA2 4QX, UK
>  >>>>Tel: +44 1225 789347
>  >>>>Mobile: +44 0797 491 8202
>  >>>>www.eurostep.com
>  >>>>www.share-a-space.com
>  >>>>
>  >>>>-----Original Message-----
>  >>>>From: Trine.Hansen@dnv.com [mailto:Trine.Hansen@dnv.com]
>  >>>>Sent: 15 October 2004 18:03
>  >>>>To: plcs@lists.oasis-open.org
>  >>>>Cc: Leif.Tonning@dnv.com
>  >>>>Subject: [plcs] Workshop #2 - Synchronise work on DEXs and reference
>  >>>
>  >>>data
>  >>>
>  >>>>between PLCS pilots and OASIS/PLCS
>  >>>>
>  >>>>
>  >>>>All.
>  >>>>Please find attached
>  >>>>(1) An updated figure of the proposed example "business concept" that
>  >>>
>  >>>will
>  >>>
>  >>>>be used in the planned workshops and
>  >>>>(2) Spreadsheet with draft input to the reference data discussions.
>  >>>>The attached spreadsheet is a draft input to the reference data
>  >>>>discussions.
>  >>>>Column A, E, F and H refer to instantiation diagrams and capabilities
>  >>>
>  >>>>produced in the Norwegian pilot and should only be viewed as
>  >>>
>  >>>references
>  >>>
>  >>>>only.
>  >>>>
>  >>>>
>  >>>><<Business concept v2.ppt>> <<equipment&part_values.xls>>
>  >>>>Regards
>  >>>>Trine Hansen
>  >>>>UCTNO940, Information Quality Management
>  >>>>Det Norske Veritas AS
>  >>>>( + 47 67 57 96 38 (office)
>  >>>>( + 47 90 83 44 24 (mobile)
>  >>>>* trine.hansen@dnv.com
>  >>>>http://www.dnv.com
>  >>>>
>  >>>>
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>  >>--
>  >>========================================================
>  >>Per-Åke Ling            email: per-ake.ling@eurostep.com
>  >>Eurostep AB             mobile: +46 709 566 490
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> 
> -- 
> ========================================================
> Per-Åke Ling            email: per-ake.ling_AT_eurostep.com
> Eurostep AB             mobile: +46 709 566 490
> Vasagatan 38            http://www.eurostep.com
> SE-111 20 Stockholm
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> ------------------------------------------------------------------------
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-- 
========================================================
Per-Åke Ling            email: per-ake.ling_AT_eurostep.com
Eurostep AB             mobile: +46 709 566 490
Vasagatan 38            http://www.eurostep.com
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