השוואת שיטות

	מדד F1	דיוק (Precision)
תחום	הערכת מודלים	הערכת מודלים
משפחה	MCDM	MCDM
שנת המקור	1979	20th century
הוגה השיטה	C. J. van Rijsbergen	Historical statistical foundations
סוג	Evaluation metric	Evaluation metric
מקור מכונן	van Rijsbergen, C. J. (1979). Information Retrieval (2nd ed.). Butterworth-Heinemann.	Fawcett, T. (2006). An introduction to ROC analysis. Pattern Recognition Letters, 27(8), 861-874.
כינויים	F-measure, Harmonic Mean	Positive Predictive Value, PPV
קשורות	5	5
תקציר	The F1-score is the harmonic mean of precision and recall, providing a single metric that balances both concerns. It was introduced by van Rijsbergen in information retrieval and has become a standard metric for evaluating classification models where both precision and recall are important.	Precision measures the proportion of positive predictions that were actually correct. It answers the question: 'Of all the cases we predicted as positive, how many were truly positive?' Precision is critical in scenarios where false positives are costly.