A sales funnel that works for Professional Services - and guess what?! 

It isn't a funnel. That's because funnels don't work for Professional Services - don't let anyone say that they do. Shut them down!

Thanks to Brew'd for the nice infographic - there is more if you click through. Sadly the acromyn of this is A,C,D which actually isn't that easy and is instead a bit confusing.