Generalized multigranulation sequential three-way decision models for hierarchical classification

•We generalize the concepts of the conditional and decision attributes through concept hierarchy tree, and define a generalized hierarchical decision table.•We decompose and aggregate condition and decision attribute granules under different levels of granularity.•We propose the optimistic and pessimistic generalized multigranulation three-way decision models for hierarchical classification.•We compare the advantages under different sequential three-way decision models experimentally.