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In my opinion designers should always consider the worst situation that can result from the failure of a component. Part of this should include determining what events might be missed or ignored if a particular component fails. The system's reaction to the component failure must take these events into account. For example, a microprocessor might be used in a robot arm to monitor an electric eye that detects when something is in the path of the arm. Computer control has the potential to allow greater flexibility than previous technologies.