SAP Functions Module to find the manager of org unit position personnel no or user.
RH_GET_PERSONS_FROM_POSITION
RH_GET_LEADING_POSITION
HRCM_ORGUNIT_MANAGER_GET
find all the employee under an org. unit
RHPH_STRUCTURE_READ
RH_STRUC_GET
Read OM infotype
RH_READ_INFTY
RH_READ_OBJECT
Maintain OM Infotype:
RH_PM_ENQUEUE
RH_PM_DEQUEUE
RH_PNNNN_MAINTAIN/RH_UPDATE_INFTY
Maintain/Delimit Relationship for OM infotypes
RH_CUT_INFTY
Delimit OM Objects:
RH_CUT_OBJECT
Update database for OM objects operation in background
RH_UPDATE_DATABASE
Determine whether a position is vacant:
RH_GET_VACANCY
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http://www.saptechies.com/sap-hr-om-useful-function-modules-organizational-managemen/