A collection of standard service plans with standard activity definitions, often created and supplied by an external party carrying out the maintenance. The use of maintenance libraries is not mandatory, but they are useful for the compilation of comprehensive maintenance plans in Maintenance Planner.

In Maintenance Library, maintenance libraries are added and maintained at the Maintenance Libraries selection level. The standard service plans and standard activity definitions that are included in a maintenance library can be linked to assets in Assets .

Each internal or external party that is responsible for the maintenance of assets can add its own maintenance library with standard service plans to the Maintenance Manager > Maintenance Library TSI. So the party in charge of servicing the air-conditioning units may add one library, while the company contracted to do the paintwork may add another library.