Wow, thank you both for that!
Here are a couple of links I found on the topic to help others who may be interested, the second one is the link that deptrai provided the pointer to:
docs.lib.purdue.edu/cgi/viewcontent.cgi?article=1072&context=jate
http://www.airbus.com/fileadmin/medi...APPR-SEQ03.pdf