Definition of eSourcing, ePurchasing, and eProcurement

What do eSourcing, ePurchasing, and eProcurement mean? What are the differences between them and how an holistic approach to procurement technology helps get the best ROI. http://www.selectica.com/ to learn more about procurement.

What do eSourcing, ePurchasing, and eProcurement mean? What are the differences between them and how an holistic approach to procurement technology helps get the best ROI. http://www.selectica.com/ to learn more about procurement. Less