The  New Yorker is running a piece by Atul Gawande that starts by describing the  everyday miracles that can be achieved in a modern medical intensive care unit,  and ends by making a case for a simple and inexpensive way to save 28,000 lives  per year in US ICUs, at a one-time cost of a few million dollars. This medical  miracle is the checklist. Gawande details how modern medicine has spiraled into  complexity beyond any person's ability to track — and nowhere more so than in  the ICU. 
 "A decade ago, Israeli scientists published a study in  which engineers observed patient care in ICUs for twenty-four-hour stretches.  They found that the average patient required a hundred and seventy-eight  individual actions per day, ranging from administering a drug to suctioning the  lungs, and every one of them posed risks. Remarkably, the nurses and doctors  were observed to make an error in just one per cent of these actions — but that  still amounted to an average of two errors a day with every patient. Intensive  care succeeds only when we hold the odds of doing harm low enough for the odds  of doing good to prevail. This is hard." 
 The article goes on to profile a doctor named Peter  Pronovost, who has extensively studied the ability of the simplest of complexity  tamers — the checklist — to save lives in the ICU setting. Pronovost oversaw the  introduction of checklists in the ICUs in hospitals across Michigan, and the  result was a thousand lives saved in a year. That would translate to 28,000 per  year if scaled nationwide, and Pronovost estimates the cost of doing that at $3  million.