Before revision: A delta model is very helpful Why Arnoldo C.Hax created the "Delta model" The unique set of frameworks and methodologies, grew from the fact that changes in the world of business were so enormous that existing managerial frameworks had become invalid or incomplete.
After revision: <ref></ref Why Arnoldo C.Hax created the "Delta model" The unique set of frameworks and methodologies, grew from the fact that changes in the world of business were so enormous that existing managerial frameworks had become invalid or incomplete.