There is a very distinct difference between these three items. It is important to recognise that Q is directly addressing eTendering and eQuotations, and not eProcurement. In our terminology:

	eTendering and eQuotations relate to a Purchaser choosing a Supplier or Suppliers from whom to purchase goods or services. eProcurement relates to how suppliers (once chosen using eTendering and eQuotations) will deliver contracts - this often includes online catalogues, purchase order processing and automated bank payments and reconciliation systems.
		eTendering follows potentially extensive and formal processes often undertaken by, or in collaboration with purchasing professionals. This more formal approach is often mandated by the Purchaser for values above locally set thresholds.
		eQuotations relates to a simpler process, simply replacing existing processes where a set of 3-5 letters requesting prices, from which the cheapest is chosen. This is used for smaller value items; eProcurement relates to the operational engagement of Suppliers after they are chosen, automating purchase order taking and processing (e.g. online catalogues).
	eProcurement relates to the operational engagement of Suppliers (once chosen using eTendering and eQuotations). This often includes online catalogues, purchase order processing and automated bank payments and reconciliation systems.

Many eProcurement suppliers claim to provide eTendering as part of their application. This is often very limited in functionality, often referring to very different ways of choosing Suppliers to the processes used by the Public Sector.