SAP HCM process and form framework relies on other components including Case Management and Record Management.
Primary authorization object for HCM P&F is P_ASRCONT. The system calls the method CHECK_MIN_PERNR_AUTHORIZATION of the BAdI HRPAD00AUTH_CHECK from the function module HR_CHECK_AUTHORITY_PERNR to determine method of checking authorizations.
More details on this process are available on link below.
However a comprehensive list of all case and record management authorizations is not available for authorizations of case and record management system. The issues encountered because of missing authorizations include short dump in backend with failure to save current comments, to save attachment in case management, unable to save DRAFT of form when accessing for or creating DRAFT for the process start etc.
Below is the list of authorization we found missing and cause of issues listed above using ST01/SU53. I hope this is useful for others looking for a consolidated list of authorization objects checked by HCM P&F framework.
More details on these authorization objects is available on SAP help documentation below.