A SAP variant is defined for the HRMD_A0# message type. After the variant is defined, a job is scheduled for that variant, which captures the change documents and converts them into IDocs. The outbound process is then triggered.
Multiple change documents can be captured within a single IDoc. The number of IDocs is determined by how frequently jobs are scheduled, not by the number of change documents created. For example, several records might be added, modified, or deleted within the specified job process period. All of these changes are included in a single IDoc.