I found the article "Bring the Energy" in August's QP very interesting...and I'm curious about people's experience with using acceptance charts. I'm currently working in healthcare, and one my low-level irritants in a statistical process control sense is that we monitor certain events (patient harm, cases of c. Diff, patient falls) in a way that makes it difficult to tell if we're out of control or not - my facility has worked very hard to reduce all these types of harmful events, and we're a small facility, so one event is a huge spike.
After this article, I'm wondering if an acceptance chart might be a way of monitoring that makes more sense --- patient harm is never acceptable, but what tells us when we're out of control, or when we should take it (reluctantly) as common cause?
I'm also open to any feedback/references about using more esoteric control charts based on non-normal distributions and low-occurrence issues.
Thanks in advance!