If your goal is to reduce medical errors, create systems that don't depend on a single person's fluctuating energy level (e.g. have two doctors responsible for each patient, keep patient loads low enough that they can deal, automate as much as possible with computer systems (e.g. billing), and delegate to e.g. PAs for mundane diagnoses). Exhausted people make mistakes, can't work or think as quickly, are less creative, and are generally less happy. All the technology in the world won't help you if the key decision makers screw up at the wrong time.

After all, coffee does exist for those times when your natural energy level won't do it for you. ;)