On Work Order Plan there is new FastTab 'Additional Parameters'. It is possible to set if the asset downtime should be created automatically when the new work order is created for the plan.
It is possible to choose the category code and also start and end time for the downtime. Default values can be set also on Asset Management Setup.
During the planning in Planning Worksheet, it is possible to change the values. If the Create Downtime checkbox is marked during creating work order then the downtime entry is created automatically for the asset on Work Order Plan and date as on Work Order.