Solution to My Solution Issue, Please!

I've just finished a session with a CEO client of mine, and his team, on the nature of the transformation they want to lead their business through. We were much challenged by the debate around what a "solution" is as opposed to a product. If the customer believes your product is what they need, then it is a solution for them—isn't it? Is all this "solution speak" just management b&*s£@t? Has anyone done any serious work on what solution is? Everyone seems to talk about delivering solution ... what do they deliver that the excellent product provider does not?

I said that I knew just the community who can throw some light on this. Hope you can ...