Fig. 7
From: Quality of service and fairness for electric vehicle charging as a service
QoS and QoE metrics of the different queuing policies for all 557 charging services. The box plots show the result distribution among the charging services and the circle denotes the average value. Below the box plots, the achieved fairness index F is given. 22 kW wall-boxes with 100% transformer limitation. Note that for QoS1,QoE1 and QoE2 most of the charging service have very high service quality, hence the boxes are very tiny near to 1