Cluster analysis classifies a set of observations into two or more mutually exclusive unknown groups based on combination of interval variables and it has proven to be very useful. The classification aim is grouping the objects between their similarities or dissimilarities and so providing a...

The new trend of globalization constrains companies worldwide to go outside of national frontiers to look for the specialized firms for different business areas in their needs for best equilibrium between high quality of services and cost-effective solutions. This trend emerges also in IT...