The SESAR deployment project 2015_217_AF4 was successfully completed by BULATSA. The initiative implemented a traffic complexity management system in Sofia ACC, fully satisfying the requirements of PCP – Sub-AF 4.2, related to the implementation of automated support for traffic complexity assessment. The project was funded by CEF and coordinated by SESAR Deployment Manager. The new system provides FMP managers and ACC Supervisors with tools for detailed workload assessment, sector configuration optimization and local STAM evaluation. In the following years, BULATSA plans further expansion of the system in order to strengthen the integration with other internal systems and take advantage of the full palette of NM B2B services.