The cost of bringing the wrong person on board is sometimes huge. Searching and training can cost from $5000 for a lower-level manager to $250,000 for a top executive. Years of corporate downsizing, a trend that has slashed layers of management, has also increased the potential damage that one bad executive can do. With the pace of change accelerating in markets and technology, companies want to know how an executive will perform, not just how he or she has performed.