Use this tab to enter and view information about referenced plans. A referenced plan is a plan consisting of lines that references a certain project. The referenced plan lines in this tab can also reference a specific sub-project or activity within the project chosen. It is also possible to leave the sub project- and activity range fields blank on the lines which corresponds to that all sub projects and activities will be considered. If IFS/Maintenance Planning Board is used reference plans can be visualized in maintenance planning board. In contrary to a manual plan, operational modes are not possible to connect for reference plans. Therefore the referenced plan cannot hold information about which operational event that are ongoing on certain equipment object and a referenced plan can therefore not be used to derive the object accessibility for scheduling with maintenance planning board.