One or more embodiments of a method and device taught herein provide for monitoring wireless terminal behavior in a wireless communication network, where each wireless terminal has a defined terminal type. Data describing the behavior of a plurality of wireless terminals in the wireless communication network is obtained. Based on the obtained data, an aggregated severity score for a given terminal type is determined that is indicative of the extent to which one or more of a plurality of performance criteria have not been met by wireless terminals of the given terminal type. If the aggregated severity score for the given terminal type exceeds a corresponding severity score threshold, one or more of a plurality of predefined actions are performed based on the extent to which the threshold is exceeded.