A measured output curve has measured wellhead pressure data at different steady-state wellhead mass flowrates for a discharging well. You won't need too many measured output curves, because one of the main functions of WellSim is to calculate an output curve from a discharge simulation and wellhead measurements at one mass flowrate.
This tutorial shows you how to enter a measured output curve for a well:
In the sample database, open a new measured output curve for
.
Enter these values:

The measurement at 100 t/hr, 65 barg is what was used for the TopDown discharge simulations TD 100 t/hr and Better TD 100 t/hr see here.
Click
to check, apply and save the data, then exit.
You will later compare this measured output curve with the curve calculated by an output simulation see here.