Tough management requires environmental change. People
should change jobs (not necessarily companies) at least once every
two years. People rise to new challenges more easily than trying
to rise to the same challenge month after month. This is one of thereasons companies go outside for managers. Since they have not
been bogged down and frustrated by internal battles, outsiders
often bring a fresh, exciting, and positive perspective to what has
been viewed internally as a staid or static situation.