What is Project EFDPC AND EFUPC ADD ON?

Marvin --

I believe that EFDPC stands for Enhanced Fast Density-Peak-Based Clustering. I found this information on the following web site:

https://ieeexplore.ieee.org/document/8598596

It looks like the term is used in the engineering field. I believe that the add on you mentioned is for Microsoft Project, relating to this engineering need. Hope this helps.