Challenges in model-based clustering

Model-based clustering is an increasingly popular area of cluster analysis that relies on probabilistic description of data by means of finite mixture models. Mixture distributions prove to be a powerful technique for modeling heterogeneity in data. In model-based clustering, each data group is seen as a sample from one or several mixture components. Despite attractive interpretation, model-based clustering posesmany challenges. This paper discusses some of the most important problems a researcher might encounter while applying the model-based cluster analysis. (C) 2013 Wiley Periodicals, Inc.