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HASIL TESTING MODEL - PREDIKSI PERMINTAAN STOK BAHAN KUE
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Total Data: 6742 baris
Training Set: 5392 (80.0%)
Testing Set: 1349 (20.0%)
Features: 9
Fitur yang dihapus karena data leakage: ['total_harga_update']
Target: jumlah_permintaan_bahan
Metode split: chronological split berdasarkan tanggal transaksi
Periode Training: 2021-01-01 s/d 2024-12-28
Periode Testing: 2024-12-28 s/d 2025-12-31

LINEAR REGRESSION - Test Metrics:
  R² Score: -0.0039
  MAE: 2.49
  RMSE: 2.86

RANDOM FOREST - Test Metrics:
  R² Score: -0.1338
  MAE: 2.59
  RMSE: 3.04