Ever since Frederick Taylor's early writing on industrial efficiency - followed by the work of Peter Drucker, Alfred Chandler, and others - the modern Western corporation has been managed according to a tightly defined set of rules and norms. A clear corporate strategy calls for earning at least the cost of capital, growing at a higher rate than the overall market, and managing the portfolio to a "logic" - periodically pruning poorly performing businesses. And with Wall Street analysts ready to applaud CEOs for making their numbers or pulverize them for a one-cent per share miss, there is often little opportunity to change course.