The following infotypes are evaluated for factoring in payroll: Actions infotype (0000), Organizational Assignment infotype (0001), and Absences infotype (2001). These infotypes are used to determine an employee's exact remuneration, the remuneration amount is multiplied by a partial period factor1. References =
https://help.sap.com/docs/ERP_HCM_SPV/ae31cd7e808241afb6cc47a420f059af/ae5bdd5321e8424de10000000

The processing class 01 is used to determine into which valuation basis (for example mzd /001) the wage type is to be read1. This is done in rule CZ101. At the moment of processing, wage types from IT 0008 areavailable1. References = https://help.sap.com/docs/ERP_HCM_SPV/659325223d7d437388161c0c4da88ef6/1

In SAP HCM Payroll for SAP S/4HANA, an average calculation rule is used to determine the average value for a specific wage type or set of wage types over a defined period. The average calculation rule can include several components:
Cumulation rules: These are used to define how the wage types are cumulated over the average calculation period1.
Relevant average period: This defines the period over which the average is calculated. It could be a fixed period (e.g., the last three months) or a variable period (e.g., the period of employment)2.
Final processing: This is used to finalize the calculation of the average, such as rounding off the average value1.
Function PARTT and Modifier groupings are not typically included in an average calculation rule in SAP HCM Payroll for SAP S/4HANA.
References =