calibration of model

hi every one  ;D ???
i have some questions:

-How to show the relationship between the water level measured and calculated in observation wells.

-How do we calibrate the model.  Are we using method of PEST for calibration, And how to active this service.

thank you very much.

1. Right-click into the head diagram after the run, and choose "Scatter plot". Here you can load a file containing observed water levels, and they are compared to calculated ones in a scatter plot.
2. The basic functionality of PEST is available in a module for the FEFLOW programming interface coming with FEFLOW. You can find examples in the FEFLOW demo data (examples/PEST).