RESEARCH APPROACH ABOUT RELIABILITY OF ... - BHLS - HOME

The set of indicators approach, developed by different authors, (Fielding et al., 1985)
focuses attention on the public transport system performances evaluations according to the
service provider perspective.
Any uniform set of transit performance indicators must be constructed with due regard to
both their intended use, and to the limitations of available data. Although transit operators
are apprehensive about the use of performance indicators, they should appreciate the
benefits. Performance indicators provide an opportunity to elevate the general
understanding of transit's capabilities and costs by emphasizing the productive use of
capital and labor, rather than focusing performance only on ridership and operating costs.
According to Fielding et al. during the evaluation it’s important to refer to two types of
indicators:
efficiency indicators, that measure the relationship between the input used in the
system productive process and the output used in the service provided;
effectiveness indicators, that measure the system capability to pursue a determinate
objective.
In the proposed conceptual model (see Fig. 1.1), the individuation of effectiveness and
efficiency indicators is linked with the knowledge of data about:
service inputs (workforce, capital, energy);
service outputs, (vehicles-hour, vehicles-km, seats-km);
utilization of service provided (passengers, passengers-km, revenues).
SERVICE
INPUTS
Workers
Capital
Energy
Cost efficiency
Cost Effectiveness
SERVICE
OUTPUTS
Vehicles-hour
Vehicles-Km
Capacity-Km
Service Effectiveness
UTILIZED
SERVICE
Passengers
Passengers-Km
Profits
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