E-procurement Net marketplace services include providing a marketplace for long term contractual purchasing as well as some spot-sourcing of indirect goods (MRO). They provide value chain management services to both buyers and sellers. VCM services include automation of a firm's entire procurement process on the buyer side (e.g., purchase orders, sourcing, requisitions), and automation of the selling business processes on the seller side (e.g., catalog creation, order management, invoicing).