Kotler and Mindak (1978 – take note of that date) recognised five main models that describe how companies operate their Public Relations and Marketing departments. (You could also interpret these models as indicative of how a company’s structuring reveals its management’s perceptions of the two functions’ relative importance, similarity, and relatedness of the requisite skill sets).
When discussing these structures, I prefer to use these terms:
Bits Overlap (B);
In the articles that follow, I discuss each of these.