olemus
(1) vt teenus vt kvaliteet

(2) kogum mõõdetavaid võrguteenuse
otspunktidevahelise sooritusvõime näitajaid,
mida saab eelnevalt määrata teenusetasemelepinguga,
sealhulgas näiteks läbilaskevõime, edastushilistus, veategurid, prioriteet, turvalisus, paketikaotegur

CNSSI 4009-2015:
The measurable end-to-end performance properties of a network service, which can be guaranteed in advance by a Service Level Agreement between a user and a service provider, so as to satisfy specific customer application requirements. Note: These properties may include throughput (bandwidth), transit delay (latency), error rates, priority, security, packet loss, packet jitter, etc.

ISO/IEC TR 26927:
andmete transpordi sooritusvõime tase
= level of performance for the transport of data

ülevaateid
https://en.wikipedia.org/wiki/Quality_of_service

http://ceur-ws.org/Vol-924/paper24.pdf

http://jmm-net.com/journals/jmm/Vol_2_No_2_June_2014/5.pdf

https://www.userlike.com/en/blog/measuring-service-quality

https://www.itu.int/dms_pub/itu-d/opb/pref/D-PREF-BB.QOS_REG01-2017-PDF-E.pdf

standardid
https://www.iso.org/obp/ui/#iso:std:iso-iec:13236:ed-1:v1:en

https://www.itu.int/rec/dologin_pub.asp?lang=e&id=T-REC-G.1000-200111-I!!PDF-E&type=items