Chandler's key addition to management literature was to connect strategy and structure -- since a restructuring effort is a result of a change in strategy, a company must first review its strategy, then pursue a different structure.
The adoption of new technology or the penetration of a new market warrants a review in strategy which in turn merits an organisational restructuring. The emergence or evolution of new organisational structure occurs neither in isolation nor by accident.
Professional management is essential to increase the chance of successful strategy implementation efforts. Management must devote constant attention to develop a corresponding administrative form.
With his work "Structure follows Strategy", Chandler demonstrated the relevance of business history and ensured that it would become part of educational programs in many universities.
His work helped him establish strategy as an important topic for organisations and aided the transformation of McKinsey & Company as a specialist in organisational (re)structuring into a strategy consultancy firm.
The thesis is oversimplified. The relation between structure and strategy is not necessarily one dimensional. Mintzberg argued that the current organisational form can also be regarded as constraining strategic change. Current views such as Pettigrew's, hold that structure and strategy are to be regarded as equal to one another. Rumelt concluded that structure also followed fashion.
Changes in the market structure have implications for a firm's strategy and structure. Chandler stated that a "fit-to-market" between an organisation's form and its market structure reduces its internal coordination costs and provides a better match between the firm's product portfolio and its tactical customer needs. The "fit-to-market" relationship should be secondary to the "fit-to-strategy" connection so as not to inhibit necessary strategic changes. Commercial management and its related bonus schemes represent the "fit-to-market" component in a firm and tend to defend the current status quo.
In his case studies, Chandler described the need for leadership to make the transition to the M-form, but did not regard strong leadership as a prerequisite for an efficient corporate reorganisation.
The thesis was not based on broad empirical study. The relationship between strategy and structure was described only for a large organisation's growth and diversification strategy. In turbulent environments, the unorchestrated emergence of new forms and strategies occurs.