Onboarding processes can be initiated in two ways:
Through an Applicant Tracking System (ATS), such as SAP SuccessFactors Recruiting
By adding the new hire directly (or manually) into SAP SuccessFactors Onboarding

Most companies prefer integrated systems when managing different processes. This makes initiating the onboarding process for new hires from an ATS more common than manually adding new hires directly to Onboarding.