top-down
adjective [ before noun ]
MANAGEMENT uk/ˌtɒpˈdaʊn/ us/ˈtɑːp-/starting from the highest levels or from the most general ideas of an organization, system, plan, etc.:
Staff were not happy with the top-down approach to managment of the new CEO.
The attempt to impose top-down decisions was resisted at every level.
This report follows a top-down model in its assessment of the problems we face.
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bottom-up