Results for area 1.2 Application characteristics
degree to which a set of inherent characteristics fulfils requirements
NOTE 1 to entry: User requirements can include ease of use, safety, availability, reliability, sturdiness, economy, and environmental safety. Such requirements can be explicit or implicit.
quality or state of being valid; having legal force
group of parameter which are able to measure the performance of an EFC system, e.g. communication, application, vehicle and traffic characteristics
scale of measurement of data, according to which the differences between values can be quantified in absolute but not relative terms and for which any zero is merely arbitrary
NOTE Interval scaled parameters are applicable in mathematical equations using the operators plus or minus. Interval scales having a zero offset are equal to ratio scales.
EXAMPLE The temperature scale in Celsius is an interval scale, in Kelvin it's a ratio scale.
discrete classification of data, in which data are neither measured nor ordered but subjects are merely allocated to distinct categories
NOTE Nominal scaled parameters are applicable in Boolean equations using the operators equal or not equal.
EXAMPLE A nominal scale parameter for vehicles could consist of cars, trucks, vans and motorcycles.
scale on which data is shown simply in order of magnitude since there is no standard of measurement of differences
NOTE Ordinal scaled parameters are applicable in Boolean equations using the operators greater, greater or equal, less or less or equal.
specific calculations used to describe the charging performance of a system
NOTE These calculations are technology and schema-independent.
scale of measurement of data, having a fixed zero value, which permits the comparison of differences of values
NOTE Ratio scaled parameters are applicable in mathematical equations using the operators multiplication and division.
difference between the measured charge (toll) value and the actual value (as measured by a reference system)
NOTE A positive error means that the measurement exceeds the actual one.
ability of two or more pieces of equipment to operate in conjunction
preservation of confidentiality, integrity and availability of information
NOTE 1 to entry: In addition, other properties such as authenticity, accountability, non-repudiation and reliability can also be involved.
safeguarding the accuracy and completeness of information and processing methods
group of parameter (reliability, availability, maintainability) which are able to define the quality of EFC equipment by qualitative and quantitative figures
interval of the Relative Charging Error varying from a negative (undercharge) to a positive (overcharge) value that the Toll Charger considers as acceptable, i.e. correct charging
ratio between the Absolute Charging Error and the actual value, i.e. Relative Charging Error = Absolute Charging Error/Actual Value