SiWIM E is a multi-threaded (i.e., running several processes at the same time) program running in the 32-bit Microsoft Windows environments. To prevent the system from loosing data, the data acquisition thread has the highest priority, followed by the data evaluation (weighing) thread and the lower level threads, such as displaying of the results.

SiWIME has been developed on a Windows^® NT 4.0 platform and has been tested under Windows^® 2000/XP. Even for traffic volumes of more than 30,000 vehicles/day it is capable of processing up to 24 input channels with real-time filtering and processing when run on a 150-MHz Pentium^® MMX^® computer with 128 MB of RAM memory.

Due to its complexity, Si WIME contains several maintenance tools which permanently monitor the condition of the weighing process and can, if necessary, restart individual components of the program or even restart the computer. Several vital measuring parameters, including the basic traffic statistics, are transferred at specified intervals through a mobile telephone link to a supervising computer. In a case of a pre-defined situation (e.g. loss of power, exceptional loading, difficulties with axle detectors ...), an SMS message is sent over the GSM module to the person(s) in charge for the system.