resources (VMs in this example) shown with the same colors.
The first requirement in this use case is that the Controller needs to detect
-faults in the NVFI ("1. Fault Notification" in :numref:`figure1`) affecting
+faults in the NFVI ("1. Fault Notification" in :numref:`figure1`) affecting
the proper functioning of the virtual resources (labelled as VM-x) running on
top of it. It should be possible to configure which relevant fault items should
be detected. The VIM (e.g. OpenStack) itself could be extended to detect such