This document  provides  an overview  of  standards in the set  Business  Interoperability Interfaces (BII) for public  procurement. It covers the first part of the e- procurement chain. BII focus  on exchange of information between  business  partners. This brings in  scope all  electronic  communication between a contracting authority and an economic operator. Back-office information processing is out of scope.
To ensure interoperability each electronic communication will be described as follows:
- A choreography describes the sequence of transactions;
- A transaction describes all information elements exchanged between business partners;
- A syntax implementation guideline (SIG) provides the syntax bindings needed to implement the transaction
- A procurement procedure guideline identifies the position of the transactions in a procedure.

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This choreography describes the exchange of information in the Fulfilment phase between seller and buyer where the seller wants to announce delivery of the ordered goods or services. The purpose of the fulfilment it is to monitor the executions of the contract. This process is the process between the ordering process and the billing process. The billing process can start when fulfilment has been initiated.
The business value for this is
• To prepare the buyers organisation for the physical delivery.
• To enabling an automatic check of delivery for the buying organisation before paying the received invoice.
• To match the ordered products with the physical deliveries, such as serial numbers, lot identifiers and other information that may not be present at the time the goods were ordered.
• The assist in getting an accurate calculation of the environmental footprint of the goods by including the emission during the transport.
• To feed data into the logistic process, so no retyping is needed during the transport of the goods.
Transactions used in the specified choreographies are out of scope. These transactions are specified in the related transaction specification on “Fulfilment Transactions”.

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