"Patient safety", "robust systems", & "reliable systems" are all hot topics in healthcare quality improvement. Did you know there are well-known, rigorous tools to demonstrate whether your process / system is capable of reliably producing a certain outcome? It turns out that variation in performance, not average performance, relates much more directly to patient risk. Look here and visit the podcast beneath!
This podcast describes how to represent risks to your patients for a particular outcome in your system. From the podcast: "how we perform versus our upper specification limit and our lower specification limit. Again, the width of our performance curve indicates the amount of risk a given patient has when they enter our system for having a bad outcome."