The ever-increasing need for flexibility of business collaborations that ultimately involve a large number of virtual enterprises puts demands on their design. Competitive markets require the collaborations to be highly agile, effective, and efficient. This paper defines Internet scale virtual enterprise collaborations (ISVECs) as well as their characteristics. We further present a process modeling method for Internet-based virtual enterprise collaborations. An end user process modeling language of ISVECs and a meta-model of the language are provided. Finally, we demonstrate how the method and language are used.