A method includes (a) detecting based on reporting information from UEs, HO problems which have occurred within a predefined time interval, (b) classifying the detected HO problems into three categories, (c) determining information being related to at least one of the detected HO problems, wherein the information represents a refinement of one or more of the three categories or wherein the information represents a further category, (d) counting a the numbers of HO problems which have been classified into the various categories, (e) reporting a key performance indicator message indicative for the numbers of the various categories and for the determined information, and (f) adapting, based on the reported key performance indicator message, the value a mobility related network configuration parameter of the mobile radio communication network such that the mobility robustness of the communication network is optimized.