|maintenance planning object (IS-AD-MPD)|
A document in the MPD Workbench document hierarchy that describes specific tasks to be performed and their scheduling parameters. Groups the maintenance plans and the task lists. Describes when and where (maintenance plan) and what (task list) needs to be maintained in the aircraft. It is the 'link' between engineering and execution. Several maintenance plans can be assigned to an MPO, and the task lists are assigned directly to the maintenance plans. The MPOs themselves are assigned to maintenance planning groups (MPG)s.