(5)When input data is contributed, one important monitoring check is to ensure that the contributions are provided within a time-period set by the administrator. This is to ensure consistency between contributions from different contributors. When input data is not contributed, the time at which the input data is considered also has to be checked in order to ensure consistency between different input data. The administrator should therefore be required to check that input data is contributed, or selected from a specified source, within the time-period set by it.