fuel management in the traditional way and its drawbacks

1 tank theft
Tank transport enterprise security measures only psychological comfort , almost no effect.
2 fuel tank monitoring ( oil floats )
There are security risks ,  oil expeller  safety certification. Because of device design flaws , can not achieve accurate monitoring.
3 quota management or contracting
Consumption of fixed data ,  oil refinery  rely on experience setting. In order to obtain a higher fixed fuel consumption, drivers tend to be easily formed coalition of interests , using various means of collective transport enterprises to demand higher fuel consumption quota.