Useful resources for further reading and exam references:

1. North-East August 2003 Blackout (scroll to the bottom of this page for final report by joint US-Canada task force) http://www.ieso.ca/en/Corporate-IESO/Media/Also-of-Interest/Blackout-2003
2. Reliability Indices - https://wiki.openelectrical.org/index.php?title=Reliability_Indices
3. Sample reliability indices record by utility - http://www.musfiber.net/service/power/Reliability_indices.php
4. IEEE Std 493-2007 - Recommended Practice for the Design of Reliable Industrial and Commercial Power Systems