Home › Services Offered › Power › Power Operations › reliability

Reliability Indices

Below is a table of MUS' reliability indices for the past 17 years.  With the exception of ASAI number, the lower the number in the table the better the score.  MUS rates in the top quartile for each of the categories. 
 
 Fiscal Year SAIFI SAIDI ASAI CAIDI
2016 1.76  97.60 0.99981 55.43
2015  1.81  112.59 0.99979  62.10 
2014  1.47 105.98  0.99980  71.93 
2013 2.02  111.15  0.99979  55.12 
2012  1.30  44.86  0.99991  34.40 
2011**  2.12  176.54  0.99966  83.37 
2010  1.21  80.39  0.99985  62.27 
2009  1.16  85.01  0.99984  73.40 
2008  2.55  167.37  0.99964  73.39 
2007**  2.24  215.24  0.99959  96.10 
2006  2.12  87.49  0.99983  41.29 
2005  1.50  73.97  0.99986  49.15 
2004  1.16  68.16  0.99987  58.54 
2003  1.26  71.99  0.99986  57.19 
2002  1.58  68.90  0.99987  43.59 
2001  3.08  138.71  0.99974  45.05 
2000  2.48  87.02  0.99983  35.09 
**Major storms significantly affected these indices

SAIFI = Average Frequency of Sustained Interruptions per Customer
SAIDI = Average Minutes of Interruption Duration per Customer
ASAI = Average percentage of Time Power Provided per Customer
CAIDI = Average Time to Restore Service to Average Customer