Principles are ways of successfully dealing with reality to get what you want out of life.
Ray Dalio, one of the world’s most successful investors and entrepreneurs, cites principles as his key to success.
Your goals must be the right size to warrant the resources that you allocate to them. An organization might not be big enough to justify having both a sales and an analytics group, for example. Bridgewater successfully evolved from a one-cell organization, in which most people were involved in everything, to a multicellular organization because we retained our ability to focus efficiently as we grew.
Temporarily sharing or rotating resources is fine and is not the same as a merging of responsibilities. On the other hand, the efficiency of an organization decreases as the number of people and/or its complexity increases, so keep things as simple as possible. And the larger the organization, the more important are information technology management and cross-departmental communication.