The 4 Basic ones (traffic, accesibility, reteinability and integrity)
PS or CS or HS Accesibilitty= (RRCfailrate * RABfailrate * Iubfailrate)
Iubfailrate always close to 100% (so the main factors here are RRC and RAB fail rate
Each service has its own counter (speech, CS64, HS, etc) with pretty much the same name (mo: utrancell)
reteinability
Drop rate: for some engineers (me included) only usefull for speech. There are specifics couters to calculate the KPI and to indicate the reason for the drop you need to look for them in Alex ( mo: utrancell)
Minutes per drop: related to reteinability for PS or HSDPA
There are specifics couters to calculate the KPI look for them in Alex ( mo: utrancell)
Traffic: Speech erlangs, PS_R99 HSDPA and HSUPA (erlangs, Kbps and number of simultaneous users)
Integrity: The most important is the Throughput for R99, HSDPA and HSUPA(measured in RNC and nodeb)
There are a lot more for monitoring and troubleshooting but to long to explain here: Noise rise, classA B or C fail rate and VC utilization (in case of atm iub links). Monitoring of scheduler resourses, bler and cqi monitoring, Channel elements utilization.