For larger projects, we often export the previous year's project to ensure all tasks added throughout the year are captured. We then clean up the list (i.e. remove tasks that are one-off or specific to the past year) and then reimport. Right now, the export is not compatible with the import and quite a bit of work has to be done to make it compatible and to maintain the structure (WBS, predecessors). First, the export needs to include these items (right now, it does NOT and has to be added manually). Second, the export is messy and would benefit from having a compatible import structure (like the sample csv import spreadsheet).
