Where the demands of a job are fully predictable and can be specified precisely, and
where individuals can undergo a course of training that enables the skills required to
be developed to the desired standard, the matching of people to jobs becomes
a straightforward business. There is, however, one drawback: this is largely a van-
ishing scenario. It applies least of all in the world that executives inhabit. So volatile
is this world that it is not unusual for the specific demands of a job to change even
before a newly appointed executive has settled in, or for an appointee to start in a post
without being fully aware of what the job entails.