Hi Dear ,
you can assigned this role for Solman workcenter,
SAP_SMWORK_SYS_ADMIN: providing access to System Administration, and
SAP_SMWORK_SYS_MON: providing access to System Monitoring.
SAP_SMWORK_BASIC - Basic authorization to work on work centers.
SAP_SMWORK_ITEST - Work center for Test Management.
SAP_SMWORK_LANDSCAPE_MAN: providing access to System Landscape Management,
These roles are contained in composite role SAP_SMWORK_ADMINISTRATOR_COM
Regards
NAyeem