ITU E.420:1988
ITU E.420:1988 Checking The Quality Of The International Telephone Service - General Considerations
Table of Contents
1Qualityofserviceparameters2Methodsofmeasuringthequality
ofservice
3Othersourcesofinformationonthe
qualityofservice
ANNEXA-Apossibleapproachtointegrateactivities
measuringthequalityofserviceintoan
overallproblem-investigatingpro
ANNEXB-Utilizationofcustomercomplaintstoimprove
thequalityof
B.1Datatobecollected
B.2Statisticalprocessestoimprovethe
reliabilityofthedata
B.3Analysisofcomplaints
Reference