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Subject: [ebxml-cppa-negot] RE: Counter Offer Suggestion 1: change of subject,change of NDD, counterproposal as "edit history"
<DaleMoberg> [snip] First. CounterOffers occur after someone has initiated CPA Negotiation by at least sending a negotiation message, a draft proposed CPA, and a NDD proposed as governing the proposed CPA. MWS: I agree. Second. A CounterOffer should not constitute a wholesale change of subject (refer to a different business process specification or change the roles of the participants. MWS: I agree. The spec. has to make this clear. Dale: I do think that eventually some small tweaks that in effect change the BPSS in play (beyond than the BusinessProcessCharacteristics attributes) might be part of Negotiation. Possibly a participant might want to replace "PO -> PO Confirm --> AdvanceShipN --> Invoice --> PaymentAuth" by something like "PO -> AdvanceShipNotice --> PaymentAuth" This has been done by some businesses to reduce message traffic (so the AdvanceShipNotice that contains the PO number contains an Invoicing function). But I am willing to postpone all these aspects of negotiation to later as long as we have a placeholder for them... Third, a distinctive factor of the counter offer was that it could use the NDD of the countering party. I am uncertain whether we have decided to allow it to include a distinct draft CPA from the countering party, but we had discussed this at one point. MWS: I don't think that we have really considered these points yet. I have been working on the assumption that the current consensus is that one negotiation dialog works with the NDD and draft CPA (CPA Template) offered by the party submitting the initial offer. I suspect that allowing the countering party to submit its own NDD and CPA Template with a counter offer will add considerably complexity. Of course the countering party can do a complete reject and then submit its own initial offer starting a new negotiation dialogue. Dale: If reject-submit is how we have a placeholder for putting a new NDD in play, I hope we explicitly document this procedure even if we don't devote a lot of discussion on it. We then at least have a placeholder. Perhaps we can suggest this be done when a firm reject occurs, but before configuration is left entirely to humans. MWS: It occurs to me that allowing the countering party to submit its own NDD and CPA template could violate Dale's rule (above): A CounterOffer should not constitute a wholesale change of subject . Dale: Wholesale change of subject would be switching roles in a process or possibly shifting to an entirely new ProcessSpecification. Also, see above as BPSS eventually negotiable (not by December!) I don't think that the other side's NDD for the same ProcessSpecification and Role assignment would be a change of subject, just a change of approach to the same subject! MWS: I have some text in the draft specification to the effect that if a party that intends to make an offer has access to the other party's NDD, it might wish to build a new NDD that covers what is negotiable in the two original NDDs.
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