This report on e-procurement and e-sourcing reviews the e-procurement and e-sourcing  business   issue by elaborating on four primary dimensions. The first dimension reviews e-procurement's   business processes and accordingly elaborates on various e-procurement processes including   auctions, contract management, transactional procurement, e-marketplaces, e-procurement   analytics, collaboration, and RFP based procurement. The second dimension describes e-   procurement's business architecture in which the report explains various procurement channels and   procurement methods. The third dimension elaborates on e-procurement's technology architecture   that sheds light on e-marketplace-centric and buyer centric e-procurement architectures. In this   context, the report also reviews supplier systems and their characteristics. Finally, the fourth   dimension delineates the various software vendors and their respective e-business solutions for e-   procurement and e-sourcing.