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 .
After revision: within that entity or organizationCentralisation 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 .