Before revision: Centralisation or centralization (see spelling differences ) is the process by which the activities of an entity or organization, particularly those regarding planning, decision-making and control of strategies and policies, become concentrated within a particular group, sector, department or region within that entity or organization.
After revision: Centralisation (“centralization” in U.S. English ) is the process by which the activities of an entity or organization, particularly those regarding planning, decision-making and control of strategies and policies, become concentrated within a particular group, sector, department or region within that entity or organization.