The divisionalized form differs from the other four configurations in one central respect: it is not a complete but a partial structure, superimposed on others. Those others are in the divisions, each of which I shall be arguing is driven toward machine An organization divisionalizes for one reason above all-because its product lines are diversified. And that tends to happen most often in the largest and most mature organizations, those that have run out of opportunities or become stalled in their tra ditional markets, such diversification encourages the organization to create a market-based unit, or division, for each distinct product line las indicated in Exhibit ll) and to grant considerable autonomy to each division to run its own busin That autonomy notwithstanding, di tion does not amount to decentralization, although the terms are often equated with each other.