Logistic regression gives every NorthPeak column a weight and adds them up; nobody can read that sum as a rule. A decision tree works differently. It asks one yes/no question about one column at a time, and you can print every question. On the first six months of 2025, a tree of depth 2 finds by itself that a 3-day vibration mean 0.67 mm/s above the 14-day mean marks 73 % of the rows as faults. This lesson explains how a tree chooses its questions, how to read it, and what depth means.
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