In current research it is suggested to use the Enterprise Architecture (EA) management approach, which enables to decrease the duration and to improve the efficiency of IS integration process. Developed framework for business process implementation is adapted to the requirements of the Virtual Collaborative Network of Enterprises. The key business processes should be described internally based on common standard for all collaborative partners and it is suggested to use the ISO 9000 Quality Management standard as a base. This process is followed by analysis of inter-organizational business processes and possible process modeling solutions are also outlined in the paper. The implementation and management of collaborative business processes decrease the risks for the new potential customers and partners on the way to successful collaboration. After the collaborative business process is described it is possible to proceed with the implementation of collaborative IS.