Father Jeff Dole, the Rector of St. Pius X Seminary at Loras College in Dubuque, walks us through the key features of the PPF 6, for instance:

The 4 Dimensions of Formation:
Human - Spiritual - Pastoral - Intellectual

 The Four Stages of Seminary Formation:
Propaedeutic, Discipleship, Configuration and Vocational Synthesis 

https://dbqarch.org/experience-the-seminary