Hi,
Thanks for taking the time to reply 
I have been looking at the book on Amazon, and they wouldn't let me look inside - so I'm not sure what O'Brian said about formulae. The book I read by Lorraine was something that I dug out of an attic fifteen years ago, read once (put nearly everything to use), and promptly left to gather dust in the original attic. There wasn't anything about formulae - mostly just show-off techniques.
Alex, what is a flow-chart? Is this something that I missed in the PR course or book?
