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Table 16 Subjective interpretation of the Silhouette coefficient (Kaufman and Rousseeuw 2009)

From: Using ELECTRE-TRI and FlowSort methods in a stock portfolio selection context

Silhouette coefficient

Proposed interpretation

0.71–1.00

A strong structure has been found

0.51–0.70

A reasonable structure has been found

0.26–50

The structure is weak and could be artificial

0.25

No substantial structure has been found