The document discusses four key organizational design challenges that managers face: differentiation, coordination, centralization, and adaptability. It describes how increasing differentiation among roles and subunits requires greater integration to ensure coordination. Managers must also balance centralization of decision-making with decentralization to allow flexibility. Finally, organizations need structures that can standardize processes but also allow for adaptation through mutual adjustment. The challenges shape two basic structural types - mechanistic, suited to stable environments, and organic, for dynamic settings. The contingency approach advocates designing structures based on an organization's environment.