De- centralization is an expression of the dispersal of decision-making power in an organization. Divi sionalization refers to a structure o mous market-based units. A divisionalized structure in which the managers at the heads of these units retain the lion's share of the power is far more cen- tralized than many functional structures where large numbers of specialists get involved in the mak ing of important decisions In fact, the most famous example of divisionaliza- tion involved centralization. Alfred Sloan adopted the divisionalized form at General Motors to re- duce the power of the different units, to integrate the holding company William Durant had put to- gether.