P.H.D. is an A.DE.T.T.E.'s activity. This activity was developed aiming to support the hospitality business sector.

P.H.D.'s ambition is to resolve any kind of operational or managerial problem that may arise within a hotel enterprise. This ambition can be achieved,  in full cooperation with several professionals. Those professionals are members of A.DE.T.T.E.. They are able to demonstrate a high level of education and specialization in a vast variety of operational fields in the hospitality indust.