First of all, this is not my idea, I just discovered it in an old Atlas F1 article.
http://atlasf1.autosport.com/2000/san/preview/goodchild.html
http://atlasf1.autosport.com/2000/san/preview/goodchild-stats.html
Their method can provide all seasons with numerical values in the framework of a fairly well thought-out system and I just began to wonder how more recent seasons would fare (the article was written in 2000).
It’s past 1am here, so I’m too tired to do it now, but it also seems to be a bit too meticoulous for my liking anyway. Still, I wonder if someone else is interested enough to do the task.