1. A method comprising: accessing a model of one or more parts of a plasma system, the plasma system including a plasma chamber, a radio frequency (RF) generator and a transmission line between the plasma chamber and the RF generator; receiving data regarding a supply of RF power to the plasma chamber, the RF power supplied via the transmission line to the plasma chamber using a configuration that includes one or more states, the one or more states repeat continuously during the supply of power to the plasma chamber; using the data to produce model data at an output of the model during the supply of RF power to the plasma chamber, the model data being associated with one of the one or more states; examining the model data during the one of the one or more states, the examining being of one or more variables that characterize performance of a plasma process of the plasma system; identifying a potential fault for the one or more variables during the one of the one or more states; determining that the potential fault has occurred for a pre-determined period of time during the one of the one or more states, such that the potential fault is identified as an event; and classifying the event.