The paper contains analysis of 1C corporate implementation technology to deploy ERP-systems in Russian and localized foreign companies. The stages, activities and documents of the 1C methodology are described. Comparing spiral 1C methodology with cascade ADM model, issues of 1C CIT are identified: variability of stages, requirements collecting, user acceptance testing, data migration and cutover, which is important to be resolved for ERP-system implementation projects at Russian enterprises. Using the experience of deploying foreign software, it is proposed to adapt 1C CIT to ADM model, thereby making it relevant for use in localized foreign organizations with their own specifics.