To create a new personnel calculation rule, you need to use transaction PE01. This transaction allows you to access the rule editor, where you can define the rule type, the variable key, and the operations for the rule. You can also assign the rule to a payroll schema or a sub-schema using transaction PE02. The other transactions are not relevant for creating a new personnel calculation rule. PA30 is used to maintain employee master data, PA03 is used to display payroll control records, and PE02 is used to maintain payroll schemas and sub-schemas. References = Payroll Operations, Payroll Schemas and Personnel Calculation Rules PCR SAP HCM (HR), Personnel Calculation Rules