The invention relates to an improved process for preparing trimethylhexamethylenediamine, hereinafter referred to as TMD for short, by hydrogenation of trimethylhexamethylenedinitrile, hereinafter referred to as TMN for short, in the presence of a shaped hydrogenation catalyst of the Raney type. Specifically, under the present invention, web user sessions are tracked on an analytics system based upon a unique identifier assigned to a requested web page and a session cookie that identifies a particular web user session. During the delivery, a variety of different sensors and scanners gather data that is used to avoid obstacles andor continuously adjust the movement of the tug in order to more closely follow the intended path. The supporting portions project from an innermost part of the insertion cavity. The display control unit changes a display mode of the display element indicating the position of the specific object in accordance with the result of the determination performed by the first determining unit. Further, the service quality mapping module can define a linear dependency between a customer quality parameter and at least one key quality parameter.