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The article describes a project for developing the credit control procedure, an important task handled by the administrative services of the Centro Comune di Ricerca della Comunità Europea of Ispra, introducing the technology of expert systems in order to handle its complexity. The expert system may be called up directly by a user wishing to have information on the availability of credit or by on-line transactions requiring this type of enquiry. It in fact supports accessing of external databases and accessing by traditional user terminals. The expert system has explicit knowledge of the methods of calculating the availability of credit, limits of authorisation and all alternative action necessary in order to carry out or reject operations temporarily suspended. There are additional advantages which derive from the centralisation of credit control and the possibility of interaction at a higher level. The expert system consists of a knowledge base, a functional language for producing rules and an "inference engine". The knowledge base consists of a set of objects and relationships organised in accordance with the entity/relationship model. Execution of rules is determined by the inference engine using a backward and forward concatenation process. The knowledge acquisition phase is supported by facilities and editors capable of formally constructing the semantic network. Realisation of the expert system is based on a standardised functional language in which the values of the entities are allocated as and when they become necessary, according to the formalisation of the lazy evaluation strategy.

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Authors: ALVAREZ M, JRC Ispra (IT);BARBAS T, JRC Ispra (IT);BASTIN F, JRC Ispra (IT);ZANOTTI D, JRC Ispra (IT);PRICCA M G, S.A.G. Italia, Milano (IT)
Bibliographic Reference: Paper presented: AICA Annual Congress, Bari (IT), Sept. 19-21, 1990
Availability: Available from (1) as Paper IT 35560 ORA
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