Question 20/II - Serveability performance and service integrity of
telecommunication services
(amalgamation of Q.37/II, Q.38/II, Q.39/II and Q.40/II from the 19851988
study period)

The CCITT,

considering

(a) that serveability performance and service integrity are defined in
Recommendation E.800;

(b) that Recommendation E.810 presents a model for telephone service
and the relationship between sub-concepts of serveability;

(c) that a uniform way of collection, analysis and evaluation of
operational data is contained in Recommendation E.800;

(d) that Recommendation E.845 contains a measure of connection
accessibility;

(e) that Recommendation E.850 contains a measure of service
retainability performance for telecommunication services;

(f) that Recommendation E.855 contains the objective for the time
duration occurrence of interruption which disrupts the
telecommunication services (annexes from Q.39/II (19851988 study
period) to be made available),

1. How can practical parameters for the defined objectives be obtained
and what collective actions can be organized to start coordinated
measurements amongst different countries? Close coordination with
Study Group IV should be aimed for.

2. What further objectives should be recommended for the serveability
and its sub-concepts and service integrity for telecommunication
service and what should be the measures of these performance
concepts?

3. What amendments should be made to the related Recommendation
taking into account experiences and observations in the field and the
advancement of technologies?

4. What are the appropriate allocations of the serveability and service
integrity objectives to the various parts of the various
telecommunications services, taking into account the models for the
allocation as recommended in Recommendation E.830?

5. How can the observed field data be collected, evaluated and
presented in a uniform way based on Recommendation E.880?