F1-measure at a glance

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• Description: Harmonic mean of precision and recall
• Default thresholds: Lower limit = 80%
• Default recommendation:
  • Upward trend: An upward trend indicates that the metric is improving. This means that model retraining is effective.
  • Downward trend: A downward trend indicates that the metric is deteriorating. Feedback data is becoming significantly different than the training data.
  • Erratic or irregular variation: An erratic or irregular variation indicates that the feedback data is not consistent between evaluations. Increase the minimum sample size for the Quality monitor.
• Problem type: Binary classification
• Chart values: Last value in the timeframe
• Metrics details available: Confusion matrix

Do the math

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The F1-measure is the weighted harmonic average or mean of precision and recall.

          (precision * recall)
F1 = 2 *  ____________________

          (precision + recall)
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Learn more

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Reviewing quality results

Parent topic: Quality metrics overview