I posted the question in another forum and I was suggested to re-post it here which may be more appropriate. Thank you in advance.
My organization structure:
Department -- has many sections ( and employees)
Section -- has many employees
Employee -- most of the employees belong to Section directly.
However, there are two departments which have no medium Sections and employees of these Sections report to Department Director directly.
I do not know what can be done to better reflect the business structure using an Entity Relationship model.
I learned of a similar posting which is still different than what I need.