MVI is defined as the integration and verification of a customer specific configuration in a multivendor environment. It is performed on the customer site or test bed in co-operation between the vendors and their customer, with a focus on end-to-end features and applications.
MVI is a logical follow-on from IOT. It is a way of providing an agreed process between customer and vendors, and provides a formal mechanism for customer involvement in their network integration, giving clearly defined roles and responsibilities for all involved parties.