Although it depends on Operator I heard that some International Standardization Sites like 3GPP and ITU-T are recommending Indicators to be Monitored and the Thresholds for those Indicators.
I am trying to find such document that describes those KPIs.
For example the document will tell that Operator should Monitor DCR as Dropped Calls divided by Successful Calls and the Benchmark for this DCR is 2%…etc for many KPIs
Can any body help me on this regards