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KMID : 0387320020120020001
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Korean Journal of Health Policy and Administration
2002 Volume.12 No. 2 p.1 ~ p.22
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Segmenting Inpatients by Mixture Model and Analytical Hierarchical Process(AHP) Approach In Medical Service
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Paik Soo-Kyung
Kwak Young-Sik
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Abstract
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Since the early 1980s scholars have applied latent structure and other type of finite mixture models from various academic fields. Although the merits of finite mixture model are well documented, the attempt to apply the mixture model to medical service has been relatively rare. The researchers aim to try to fill this gap by introducing finite mixture model and egmenting inpatients DB from one general hospital. In section 2 finite mixture models are compared with clustering, chi-square analysis, and discriminant analysis based on Wedel and Kamakura(2000)’s segmentation methodology schemata. The mixture model shows the optimal segments number and fuzzy classification for each observation by EM(expectation-maximization algorism). The finite mixture model is to unmix the sample, to identify the groups, and to estimate the parameters of the density function underlying the observed data within each roup. In section 3 and 4 we illustrate results of segmenting 4510 patients data including monial and ratio scales. And then, we show AHP can be identify the attractiveness of each segment, in which the decision marker can select the best target segment.
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KEYWORD
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market segmentation, CRM, mixture model, over-lapping clustering, non-overlapping clustering, fuzzy cluster, AHP
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