PS Overview

http://wolcottconsulting.com/documentation/Project%20Systems%20Structure%20Overview.pdf

PS Database Tables overview  http://scn.sap.com/docs/DOC-28689

ECC PS Tables

PROJ Contains Projects
PSPNR is the Project ID

PRPS Contains WBS Elements
PSPNR is the WBS ID
PSPHI is the Project ID

AFVC Contains the Network Activities
VORN is the Activity
PROJN is the related WBS ID
AUFPL is the Network

CAUFV Contains the Networks
AUFPL is the Network