CONTENTS

 1     Scope
 2     References
 3     Abbreviations and acronyms
 4     Terms and definitions
 5     Maintenance Services (MSs) and relationship with the telecommunications-managed areas
 6     Outline description of the management of the Grade Of Maintenance Service (GOMS) at the Maintenance Service Customer Contact point (MSCC) and its reference model
 7     GOMS states and concepts of "acceptable" and "unacceptable"
 8     Maintenance Service Customer (MSC) expectations for the GOMS
 9     MSC requirements for the GOMS
        9.1     MSC requirements and goals independent of the characteristics of the MS
        9.2     MSC requirements and goals dependent on the characteristics of the MS
10     GOMS methodology for a Maintenance Service Provider (MSP)
       10.1     Goals of an MSP for the offered GOMS
       10.2     Relationship with an MSC for the GOMS requirements independent of the MS characteristics
       10.3     Relationship with an MSC for the GOMS requirements dependent on the MS characteristics
11     Main performance parameters/indices for the assessment, management and improvement of the GOMS
       11.1     Minimum set of performance parameters/indices for the GOMS and relationship with the type of MS
       11.2     Measurement methods for the GOMS
       11.3     Evaluation methods for the GOMS
12     Basic MS processes leading to an Operational Procedures Selection for the  management, achievement and improvement of the GOMS (OPSG)
       12.1     MS information interfacing
       12.2     MS data collection
       12.3     MS data recording
       12.4     MS data filtering
       12.5     MS data reporting
                 12.5.1     MS periodic data reporting
                 12.5.2     MS exception data reporting
       12.6     MS data performance monitoring
13     Operational procedures in case of recurrent state of unacceptable GOMS
14     Main advantages of a standardized OPSG
Annex A – MSs brief overview
        A.1     MS Provisioning
        A.2     MS Monitoring and Performance Management
        A.3     MS Restoration
        A.4     MS Billing Integrity
        A.5     MS Security
        A.6     MS Auditing
Annex B – Maintenance Service Availability calculation formula and  definition of Maintenance Service Degradation Factor
        B.1     Basic Maintenance Service Availability calculation formula
        B.2     Maintenance Service Elements degradation state – Definition of maintenance Service Degradation Factor (SDF)
Appendix I – Example of the application of an OPSG to an MS for Videoconferencing
        I.1     Overview
        I.2     MSEs and operational procedures
        I.3     Performance parameters and indices
Appendix II – Example of the application of an OPSG to  an MS for Internet service
       II.1     Overview
       II.2     MSEs and operational procedures
       II.3     Performance parameters and indices
Appendix III – Example of the application of an OPSG to an MS Provisioning for  Leased Circuit Services (LCS)
      III.1     Overview
      III.2     MSEs and operational procedures
      III.3     Performance parameters and indices
Appendix IV – Bibliography