CONTENTS

 1     Introduction
        1.1     Overview
        1.2     General guide to concepts
        1.3     General performance concepts
 2     General terminology
        2.1     Service related performance
        2.2     Item related performance
        2.3     Common concepts
 3     Quality of service terminology
        3.1     Service support
        3.2     Service operability
        3.3     Serveability
        3.4     Service security
 4     Network performance terminology
        4.1     Trafficability
        4.2     Dependability
        4.3     Transmission
        4.4     Charging
 5     Evaluation concepts
        5.1     Common concepts
        5.2     Measure modifiers
        5.3     Events and states
        5.4     Statistical concepts
        5.5     Maintenance concepts
        5.6     Time concepts
        5.7     Test, data, design and analysis concepts
Annex A  –  Related QoS/NP Handbooks and E-Series Recommendations
Annex B  –  Relations between defect, failure and fault concepts
Annex  C  –  List of recommended symbols and abbreviations
Index  –  Alphabetical list of definitions contained in this Recommendation