The power supply includes a first power connector, a power conversion circuit, a control unit and a detection circuit. The portable communication device includes a housing with a base portion enclosing base portion circuitry and an upper clamshell portion enclosing upper clamshell portion circuitry. The selected data include data units that have been modified after a prior triggering event. The detector subassembly module includes a substrate and an array of detector elements. The communication data having reached the vehicle-mounted terminal in the vehicle closest to the target position is relayed to surrounding vehicle-mounted terminals through broadcasting. The graphical drawing may be a flowchart drawing corresponding to one or more paths of the workflow and the graphical elements may provide status information associated with individual steps or groups of steps of the workflow execution.