Process of replacing values as they are being entered into the SAP R/3 System.
Entered values are checked against a user-defined Boolean statement (prerequisite). If the statement is true, the system replaces the specified values.
Substitution occurs before data is written to the database.
A substitution is employee working time that deviates from planned working time and/or is paid at a different rate because the employee works at an alternative position.
Substitutions allow short-term deviations to personal work schedules, as well as different payment for an employee, to be recorded in the system. Substitutions can be set up regardless of whether the absent person is actually being replaced or substituted for temporarily.