What is the tendering process?

What is the tendering process?
Our eProcurement Offering (abcProcure.com) includes the following;
Reverse Auction Application Forward Auction Application
eTendering Application
eSourcing Application
Team Buying Application
RFQ, RFI, RFP Applications

Our Listing Services (TenderTiger.com) includes the following;
Global Tender Portal
Indian Project Portal
Indian Catalogue Portal Market Making Services OneTender, The Daily Tender Magazine