A network management system can monitor and process raw measurements of network functions (NFs). The NFs are coupled to one another via service based interfaces in a 5G network core (5GC) of a 5G network system (5GS). A server producer generates performance measurements corresponding to the one or more NFs based on the raw measurements. The performance measurements are used to evaluate and optimize the performance related to network services enablement, mobility tracking and reachability with a user equipment (UE) or the gNB according to an Access Mobility Function (AMF) component, a Session Management Function (SMF) component, a Policy Control Function (PCF) component, a Network Exposure Function (NEF) component, or a Network Function Repository Function (NRF) component, as well as associated performance parameters or measurements disclosed.