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Reliability Indices

DEFINITIONS PER IEEE STD. 1366-2003
SAIFI = System Average Interruption Frequence Index = how often the average customer experiences a sustained outage over a predefined period of time.
SAIDI = System Average Interruption Duration Index = the total duration of interruption for the average customer during a predefined period of time.
CAIDI = Customer Average Interruption Duration Index = the average time required to restore service.
ASAI = Average System Availability Index = the fraction of time that a customer has received power during the defined reporting period.

PUBLIC SERVICE COMPANY OF NEW MEXICO (PNM) RELIABILITY INDICES

Year
SAIFI (index)
SAIDI (minutes)
CAIDI (minutes)
ASAI %
Comments
2020
0.71
89.15
125.15
99.983
2019
0.89
103.39
116.56
99.9803
2018
0.98
107.33
109.02
99.9834
2017
0.88
87.44
99.54
99.9834
2016
0.92
84.18
91.38
99.9840
2015
0.78
74.63
96.06
99.9858
2014
0.74
65.39
88.74
99.9876
2013
0.74
83.86
113.53
99.9840
2012
0.62
73.96
118.72
99.9860
2011
0.82
82.72
101.21
99.9974
2010
0.81
82.63
102.08
99.9974
2009
0.81
65.40
81.15
99.9979
2008
0.70
68.16
97.73
99.9979
2007
0.73
58.11
79.86
99.9982
2006
0.74
69.31
93.66
99.9978
2005
0.49
35.92
73.35
99.9989

EL PASO ELECTRIC COMPANY (NEW MEXICO SERVICE TERRITORY) RELIABILITY INDICES

Year
SAIFI (index)
SAIDI (minutes)
CAIDI (minutes)
ASAI %
Comments
2020
0.91
126.48
139.36
99.976
2019
0.74
66.71
89.8
99.9873
2018
0.99
84.49
85.71
99.9839
2017
1.61
157.17
97.76
99.9701
2016
1.08
69.91
64.76
99.9867
2015
1.34
84.34
62.98
99.9840
2014
0.90
52.97
58.66
99.9854
2013
0.98
66.66
68.00
99.9854
2012
0.91
76.66
84.49
99.9854
2011
1.12
67.71
60.27
99.9871
2010
0.90
63.19
70.37
99.9980
2009
1.21
97.27
80.20
99.9815
2008
0.92
103.63
112.54
99.9803
2007
0.71
56.86
79.81
99.9892
2006
0.63
41.27
65.01
99.9922
2005
0.96
48.41
50.27
99.9908

SOUTHWEST PUBLIC SERVICE COMPANY (XCEL ENERGY) RELIABILITY INDICES

Year
SAIFI (index)
SAIDI (minutes)
CAIDI (minutes)
ASAI %
Comments
2020
1.03
106.21
102.66
99.9800
 
2019
0.88
103.73
117.78
99.9803
 
2018
1.03
106.21
102.66
99.9800
 
2017
0.94
90.27
96.14
99.9829
 
2016
1.17
118.32
101.53
99.9777
 
2015
1.26
132.88
105.57
99.9749
 
2014
0.80
74.57
92.83
99.9862
 
2013
1.20
93.91
78.37
99.9821
 
2012
0.93
73.77
79.20
99.9861
 
2011
0.99
77.17
77.65
99.9855
 
2010
1.06
77.74
73.60
99.9851
 
2009
0.59
44.41
75.08
99.9916
 
2008
0.81
49.96
61.56
99.9906
 
2007
0.63
38.06
59.96
99.9928
 
2006
0.58
33.16
57.15
99.9937
 
2005
0.52
31.35
60.58
99.9940