tl;dr: Bryce Harper’s so-called “bust” seasons weren’t busts at all–they were normal variation. When you plot his monthly OPS on a Process Behavior Chart, the data show consistent performance with a few true signals, not a decline. The problem isn’t Harper’s output; it’s how we misinterpret routine ups and downs without the right statistical context. … Continue reading Is Bryce Harper a Bust–or Is It Just Variation? A Process Behavior Chart Look at Performance