Consider another conflict between the decision model and the performance-evaluation model. Suppose a manager buys a particular machine only to discover shortly afterward that he or she could have purchased a better machine instead. The decision model may suggest replacing the machine that was just bought with the better machine, but will the manager do so? Probably not. Why? Because replacing the machine so soon after its purchase will reflect badly on the manager's capabilities and performance. If the manager's bosses have no knowledge of the better machine, the manage may prefer to keep the recently purchased machine rather than alert them to the better machine.