P86Model EvaluationIntermediateChoose12 min
Choose Macro or Weighted F1 for an Imbalanced Multiclass Problem
Choose an F1 averaging method based on an explicit multiclass evaluation goal.
#choose#f1#multiclass
Scenario
A support-routing model labels Billing (80%), Technical (15%), and Safety (5%) tickets. Leadership requires that Safety failures remain visible even if the overall ticket volume is small.
Problem statement
Choose macro F1 or weighted F1 for the stated goal and explain the trade-off.
Your Task
- Identify how each average weights classes.
- Choose the metric matching the stated goal.
- Name a complementary class-level check.
Related Concepts
Macro F1Weighted F1Class imbalance
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