*3.2. Data Analysis*

From the perspective of the bus company, economic benefits that can be gained from reducing energy consumption and reducing the time spent on activities or operations are priorities. When use of electric buses first commenced, the utilization rate of pure electric buses was only 50% of that of traditional fuel buses. To maximize the benefits, scheduling and charging mode innovations were implemented, achieving the same utilization rate as a traditional fuel bus. Based on these, the Nanjing Bus Company has processed the indicators in Section 3.1 to indicate four factors that contribute most to electric bus selection:

• *Factor 1: Power consumption per 100 km*

This factor is similar to the 'liters of fuel per hundred kilometers' concept in traditional fuel vehicles. It is the energy consumed by vehicles for a travel distance of 100 km, and it is one of the key economic indicators of pure electric buses. This factor is equal to the power consumption divided by the total driving distance, then multiplied by 100.

• *Factor 2: Charging duration per 100 km*

Factor 2 serves to establish a relationship between battery performance and driving performance. It indicates the battery efficiency and the pros and cons of the charging model used.

• *Factor 3: Daily average driving distance*

This is a basic and necessary index to show vehicle utilization rate, which bus companies value the most, and it is related to operation cost.

• *Factor 4: Failure time per 100 km*

This factor is related to reliability of a vehicle. This factor takes into account frequency and severity of failure, both of which contribute to maintenance costs directly and utilization costs indirectly.

These factors after calculation are given in Tables 8 and 9.


**Table 8.** Selection Factor Data for Group A.


