SLI
conceptsService Level Indicator — a quantitative measure of some aspect of the level of service being provided, used to evaluate whether SLOs are being met
Pronunciation
Correct
S-L-I
/ɛs ɛl aɪ/
Three individual letters, each spelled out. Stands for 'Service Level Indicator'. Always an initialism. The 'I' is pronounced as the letter 'eye', not 'ee'.
Source: sre.google(official spec)