OSS Counters & KPI calculation

[oliv1912]

Hello experts, I have a question about computing the Accessibility KPIs over network, time and geography.
If my KPI Access = (counter a + counter b)/ counter c so at 10:00 in the morning today I have Access T1 = (a1+b1)/c1 ... for TRX 1

If I want to compute over the sector TRX1 + TRX2, is it true to say Access S1 = [T1+T2]/2 ?

Over the whole BTS with sectors S1 / S2 and S3 Access B1 = [(T1+T2)/2 + (T3+T4)/2 + (T5+T6+T7)/3] / 3

Over time for the day T1[00:00] = (a1+b1)/c1 @00:00T1[01:00] = (a1+b1)/c1 @01:00 ... T1[23:00] = (a1+b1)/c1 @23:00
Access for T1[day] = [T1[00:00] + T1[01:00]+ ... + T1[23:00] ] / 24 ?


Over several BTS (geography)
Access Region = [ Access B1 + Access B2 + Access B3 + ... + Access Bn ] / n?

Is this correct ?

[tabordas]

Typically, if you do a KPI calculation for a Cluster ("Several BTS") or over time, you should calculate the KPI for that period and geography.
In your example it would mean:

If KPI Access = (counter a + counter b)/ counter c then you would need to:
1. Do the Sum of counter a for all the period and BTS's
2. Do the Sum of counter b for all the period and BTS's
3. Do the Sum of counter c for all the period and BTS's
4. Apply the formula to the sums that is: Access Region = (Sum(counter a) + Sum(counter b))/sum(counter c)

Doing an average of the KPI will give you the average value of that KPI, not the KPI value for that period and region.

[oliv1912]

many thanks Tabordas, appreciated !!!

[oliv1912]

you said typically, in which cases it is not typical?