Hi DozyWannabe,
Judging by the info Old Grouch unearthed
I think the credit goes to Romasik, who found the info at the Aeroflot pilots' forum.
As a software engineer, I think it looks like you've got a good, succinct description there - not rubbish at all!
Thank you. I suppose that it's a case of looking at a situation logically, almost 'mathematically'...? I still don't know if what I suggested applies to our A330 situation, though.