Issue 5 | Direct performance indicators
Direct performance indicators focus directly on the aim of reducing the energy consumption of a traction unit (or operations in general) in relation to a unit of measurement that refers to transport performance or operational performance. They can be used for both evaluating rolling stock and monitoring operations.
The big advantage of using direct indicators in awarding procedures is to leave the decision about which technologies or solutions should be used for reducing energy consumption to the TOC or the vehicle supplier. Such direct indicators show the interdependent result of an ensemble of aggregates, technologies and solutions of the fleet while the positive result of a specific solution could be balanced by a less intelligent combination with other features.
The indicator "kWh per seat km” will be the most appropriate one for most applications in the context of awarding rail passenger services or vehicles, since it can be applied to the comparison of different types of trains and operational concepts.
In certain situations, the indicators "kWh per train km" or "kWh per gross tonne km" could be more appropriate or provide relevant additional information. "kWh" can often be replaced by "litres of fuel" when diesel operations are to be analysed.
The responsibilities and the levers for improvements are very different for increasing occupancy on the one hand and improving technological efficiency on the other hand.