You can't manage what you can't see, and even if you can see it, that doesn't necessarily mean you understand it. One of the overarching problems with IT today is that no company can make a business decision of any merit without kicking off some sort of related IT process. But truth be told, very few organizations have a real handle on the relationship between a business process, such an order to cash, and the underlying IT systems that power this type of transaction. And worse yet, if they did have visibility into the process, they would probably discover that they have four sets of different systems handling overlapping business processes.
Source: Baseline, http://www.baselinemag.com