SoP 011 - A : System Average Interrruption Frequency Index (SAIFI) for AGDOM category
4th  Quarter Year - 2008-09
Sr.
No
Month Ni - Number of Customers for each sustained interruptions (in numbers) NT - Total No of customers served
(in Numbers)
SAIFI = Ni/Nt
(Monthly SAIFI)
1 2 3 4 5= 3 / 4
1 Apr-08 2057840 652603 3.15
2 May-08 1979383.2 641620.8 3.08
3 Jun-08 1775224.2 685071.8 2.59
SoP 011 - B : System Average Interrruption Duration Index (SAIDI)  for AGDOM category
4th  Quarter Year - 2008-09
Sr.
No
Month Ri =
Restoration Time for each sustained interruption event
(in hours)
Ni - Number of interrupted Customers for each sustained interruption event
(in numbers)
Ri* Ni -
Total customer interrution Duration
NT - Total No of customers served
(in Numbers)
SAIDI = Ri*Ni/Nt
(Monthly SAIDI)
1 2 3 4 5 = 3 * 4 6 7= 5 / 6
1 Apr-08 13088.87 388 5078396.78 652603 7.78
2 May-08 13252.74 461 6110243.72 641620.8 9.52
3 Jun-08 11389.98 321 3651393.61 685071.8 5.33
SoP 011 - C : Momentary Average Interruption Frequency Index (MAIFI)  for AGDOM category
4th  Quarter Year - 2008-09
Sr.
No
Month IMi =
Number of Momentary interruptions for the month
(in numbers)
Nmi =
Total no of customers for each momentary interruptions
(in numbers)
Imi =Nmi
Number of customer Mementary interruptions
(in numbers)
Nt -
Total no of customers served
(in numbers)
MAIFI=
Imi*Nmi/
Nt
1 2 3 4 5 = 3 * 4 6 7= 5 / 6
1 Apr-08 19014 443 8430953 652603 12.92
2 May-08 18127 431 7808392.4 641620.8 12.17
3 Jun-08 19005 450 8552439.4 685071.8 12.48