What to consider when protecting data / Computer World, 29 June 2007
http://www.computerworld.com.au/index.php?id=106855728&eid=-6787
Mike Joyce
"Recovery Time Granularity (RTG) is an important parameter for recovering from a logical failure. Losing access to key applications and critical business data can be devastating. With downtime costing companies from thousands to millions of dollars per hour in lost productivity and opportunity costs, it is imperative to keep the IT business infrastructure available at all times."