Core TSIs : Assets : Assets - Concepts : Asset activity definitions (Maintenance planner)
Asset activity definitions (Maintenance planner)
A ‘template’ that contains detailed data on the preventative maintenance of a particular asset. You can link
Asset activity definitions
to an asset via an asset service plan. Once linked, they can be used in the Maintenance planner TSI when setting up a maintenance plan.
* 
For more information for on adding data for an asset activity definition, see Activity definitions fields.