Maintenance levels are used to identify the operations and components used when disassembling and reassembling a part for different levels of maintenance work. In the case of disassembly, maintenance levels represent the stopping point, i.e., the set of products that the disassembly of an overhaul part or subassembly will generate. In the case of assembly, maintenance levels represent the starting point, i.e., the set of components which the assembly will put together into an overhaul part or subassembly.
Maintenance levels are also used in combination with monolithic MRO disassembly and MRO assembly structures and routings, to define the subset of operations and components that are needed to teardown a specific overhaul part to a particular point, or reassemble it from that point.
Maintenance levels can be entered at any time. However, it is intended that maintenance levels will be entered after the template structures the maintenance levels address have been transferred.