手法を比較

	デイビス・ボールディン指数	シルエット係数
分野	モデル評価	モデル評価
系統	MCDM	MCDM
提唱年	1979	1987
提唱者	David L. Davies, Donald W. Bouldin	Peter Rousseeuw
種類	Cluster quality metric	Cluster quality metric
原典	Davies, D. L., & Bouldin, D. W. (1979). A cluster separation measure. IEEE Transactions on Pattern Analysis and Machine Intelligence, 1(2), 224-227.	Rousseeuw, P. J. (1987). Silhouettes: a graphical aid to the interpretation and validation of cluster analysis. Journal of Computational and Applied Mathematics, 20, 53-65.
別名	DBI, Davies Bouldin index	silhouette coefficient, silhouette index
関連	5	5
概要	The Davies-Bouldin Index, introduced by Davies and Bouldin in 1979, is a metric for evaluating clustering quality based on the average similarity between each cluster and its most similar neighboring cluster. Lower values indicate better clustering, with a minimum of 0 representing perfectly separated, non-overlapping clusters.	The Silhouette Coefficient, introduced by Peter Rousseeuw in 1987, is a metric that measures how similar an object is to its own cluster compared to other clusters. It ranges from -1 to 1, where values close to 1 indicate well-separated and cohesive clusters, values near 0 suggest overlapping clusters, and negative values indicate misclustered points.