*4.3. Customer Satisfaction Indicator*

In contrast to prior work [22], we only employed a single function for computing the CSI value of a charging process. Based on the desired SoC given by the user (*SoCd*), the SoC at the arrival (*SoCini*), and the achieved SoC at the customer's departure (*SoCa*), the CSI is computed as:

$$\text{CSI} = \begin{cases} \frac{(\text{SoC}\_d - \text{SoC}\_{ini})}{(\text{SoC}\_d - \text{SoC}\_{ini})}, & \text{if } SoC\_d < SoC\_d\\ 1, & \text{else} \end{cases} \tag{2}$$
