The framework agreement for construction contractor work at holmenkollen national arena and at Lillomarka Skiarena shall ensure the contracting authority stable, efficient and reliable operation of the installations throughout the entire year. Most of the need is expected to be in the summer. In this period projects, operation adaptations, maintenance measures and improvements that require construction work are normally carried out. The extent of the work can vary from year to year, depending on, among other things, the awarded maintenance and investment resources. During the winter months there will be a need for mechanical and manual resources connected to, among other things, snow removal in the track network, snow clearing in the facility, grandstands and the accompanying outside areas, as well as other necessary measures to ensure operation and availability in the winter season.