Dear Paige, thank you very much for your quick and very informed answer. My aim is to investigate if these charts could be used to detect these “problems” or better “potential problems” as they happen and request attention to the process. Theoretically, they are made for that. I wanted to focus on the points of data capture (or creation if you will). I do not know if such methods are in use for data. Your input on this subject could be very helpful. Thank you very much.
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