방법 비교

	Silhouette Score	조정 랜드 지수
분야	모델 평가	모델 평가
계열	MCDM	MCDM
기원 연도	1987	1985
창시자	Peter Rousseeuw	Lawrence Hubert, Phipps Arabie
유형	Cluster quality metric	External similarity metric
원전	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.	Hubert, L., & Arabie, P. (1985). Comparing partitions. Journal of Classification, 2(1), 193-218.
별칭	silhouette coefficient, silhouette index	ARI, adjusted Rand coefficient
관련	5	5
요약	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.	The Adjusted Rand Index (ARI), developed by Hubert and Arabie in 1985, is an external clustering evaluation metric that measures the agreement between a predicted clustering and a ground truth labeling. It ranges from -1 to 1, where 1 indicates perfect agreement, 0 indicates random clustering, and negative values indicate performance worse than random chance.