| +-------------------------------+
| | vstf_Tu3 |
+--------+-------------------------------+
-|posca | posca_stress_ping |
+|posca | posca_factor_ping |
| +-------------------------------+
-| | posca_stress_traffic |
-| | |
-| | (posca_factor_sys_bandwidth) |
+| | posca_factor_system_bandwidth |
+--------+-------------------------------+