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 .
After revision: or regionCentralisation 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 .