With regard to the increasing spread of information technology in the world, access to this technology is of great importance. Due to their competitive advantages, open source software are more popular than the close ones and they are more widely used, as well. Having an appropriate process for migrating, identifying and ranking activities to prepare and perform the migration design in the organization, prevents the failure of the performance in organizations. Today, there are lots of migration processes in review of literature and this will confuse the managers to choose the most appropriate process for their organization. This article studies the presented processes of migration to open source software in the world and by presenting novel factors. It also attempts to introduce an appropriate framework to select the most efficient process in migration to open source software. So that organizations do not have a concern to choose the best migration process and IT managers are able to select the appropriate process for their organizations quickly and with no confusion.