1. SAP S/4HANA Help Portal - Maintenance Strategies: "You use a maintenance strategy to define the sequence of recurring maintenance and inspection tasks. A maintenance strategy contains maintenance packages in which you define the cycle in which the individual tasks are to be performed."
Source: SAP SE. (2023). SAP S/4HANA Help Portal - Maintenance Strategies. Retrieved from help.sap.com/docs/SAPS4HANAON-PREMISE/3757547493344b289d331531249892b2/e651c353b677b44ce10000000a174cb4.html
2. SAP S/4HANA Help Portal - Strategy Plan: "A maintenance plan for which a maintenance strategy is specified is a strategy plan. In a strategy plan
the system calculates the due dates for maintenance from the cycles of the maintenance packages that are defined in the maintenance strategy."
Source: SAP SE. (2023). SAP S/4HANA Help Portal - Maintenance Planning. Retrieved from help.sap.com/docs/SAPS4HANAON-PREMISE/3757547493344b289d331531249892b2/e151c353b677b44ce10000000a174cb4.html