This part of ISO/TS 17444 defines the Examination Framework for the measurement of Charging
Performance Metrics defined in ISO/TS 17444-1 to be used during Evaluation and/or on-going Monitoring.
It specifies a method for the specification and documentation of a Specific Examination Framework which can
be used by the responsible entity to evaluate charging performance for a particular information exchange
interface or for overall charging performance within a Toll Scheme.
It provides a toolbox of Examination Tests for the roles of Toll Charger and Toll Service Provider for the
following Scheme types:
a) DSRC Discrete;
b) Autonomous Discrete;
c) Autonomous Continuous.
The detailed choice of the set of examination tests to be used depends on the application and the respective
context. Compliance with this specification is understood as using the definitions and prescriptions laid out in
this Technical Specification whenever the respective system aspects are subjected to performance
measurements, rather than using other definitions and examination methods than the ones specified in this
Technical Specification.
Out of scope of this specification are the following aspects:
- This Technical Specification does not propose specific numeric performance bounds, or average or
worst-case error bounds in percentage or monetary units. Those decisions are left to the Toll Charger (or
to agreements between Toll Charger and Service Provider).This Technical Specification does not
consider the evaluation of the expected performance of a system based on modelling and measured data
from trial at another place.
- This Technical Specification does not consider the specification of a common reference system which
would be required for comparison of performance between systems.
- This Technical Specification defines measurements only on standardised interfaces. Proprietary
interfaces are excluded, because it is not possible to define standardised metrics on such system
properties. These excluded interfaces are among others the link between Toll Charger RSE and central
systems in DSRC systems, and the additional sensor input of GNSS modules (inertial sensors, CAN-bus
for wheel ticks, etc.).