“I had taken up the question of interdivisional relations with Mr. Durant [president of GM at the time] before I entered General Motors and my views on it were well enough known for me to be appointed chairman of a committee "to formulate rules and regulations pertaining to interdivisional business" on December 31, 1918. I completed the report by the following summer and presented it to the Executive Committee on December 6, 1919. I select here a few of its first principles which, though they are an accepted part of management doctrine today, were not so well known then. I think they are still worth attention.
I stated the basic argument as follows:
The profit resulting from any business considered abstractly, is no real measure of the merits of that particular business. An operation making $100,000.00 per year may be a very profitable business justifying expansion and the use of all the additional capital that it can profitably employ. On the other hand, a business making $10,000,000 a year may be a very unprofitable one, not only not justifying further expansion but even justifying liquidation unless more profitable returns can be obtained. It is not, therefore, a matter of the amount of profit but of the relation of that profit to the real worth of invested capital within the business. Unless that principle is fully recognized in any plan that may be adopted, illogical and unsound results and statistics are unavoidable …”

Source: My Years with General Motors, 1963, p. 49