I remember case-based scenarios being a big deal when I was in corporate america. Using them seemed to be the calling card of the b-schools! The concept is appealing, though. Additionally, it's used daily by physicians and lawyers. In their industry, many "cases" they encounter are rare and they must refer back to prior experience to understand how to deal with them. I would go even further and say that the IT industry uses cases as well - especially if you are in the Tech Support field! Referring back to how a computer issue was resolved is the primary method for solving problems with computers and networks.