At the time of plasma igniting or during plasma processing, only optimizing the distance between electrodes in each case caused a limitation to the prevention of charging damage. When the availability of free resources becomes too small or falls below a threshold, the communication system initiates a reduction in the the class of service to selected users. A plurality of feature quantities of the abnormal pattern are obtained from an image of the abnormal pattern, and, based on the distribution of the plurality of feature quantities of the abnormal pattern, a range for classifying the type of the abnormal pattern is designated. Management of service elements andor service offerings is facilitated by a Service Development Tool.