Arguments have been provided against the use of the eigenvector as the operator that derives priorities. A highlight of the arguments is that the eigenvector solution does not always respect the condition of ordinal preference (COP) based on the decision maker’s judgments. While this condition may be reasonable when dealing with measurable concepts (such as distance or time) that lead to consis...

Cooperative Information Systems implement cross-organization processes by exchanging information among each other in a mutual supplier--customer relationship. With respect to the quality of the information received, each customer system has requirements that must be met by its supplier systems. In this paper, we model the quality profile associated to a supplier as a multidimensional data cube,...

--------------------------------------------------------ABSTRACT----------------------------------------------------------The significance of decision making from the maintenance perspective has long been acknowledged by the manufacturing industry. Appropriate maintenance alternative decision making increases machine reliability and enhances both productivity and product quality. By contrast, p...

1Second Department of Orthopaedics, Konstantopouleio General Hospital N. Ionia, University of Athens Medical School, N. Ionia, Athens; 2First Department of Orthopaedics, “ATTIKON” University General Hospital, University of Athens Medical School, Chaidari, Athens; 3Laboratory of Inorganic and Analytical Chemistry, School of Chemical Engineering, National Technical University of Athens, Athens; 4...

Hierarchies are used in data warehouses (DWs) and on-line analytical processing (OLAP) systems to see data at different levels of detail. However, many kinds of hierarchies arising in real-world situations are not addressed by current OLAP systems. Further, there is still no agreement on a conceptual model for DW and OLAP design that offers both a graphical representation and a formal definitio...