Sinkron : Jurnal dan Penelitian Teknik Informatika
Vol. 10 No. 4 (2026): Research Articles October 2026

Implementation of Integrity Zone Document Classification Using IndoBERT Model and Logistic Regression

Adidtya Perdana (Computer Science Study Program, Universitas Negeri Medan, Indonesia)
Nurul Ain Farhana (Statistics Study Program, Universitas Negeri Medan, Indonesia)
Didi Febrian (Mathematics Study Program, Universitas Negeri Medan, Indonesia)



Article Info

Publish Date
05 Oct 2026

Abstract

The Indonesian government's Integrity Zone program mandates systematic classification of administrative documents into hierarchical compliance codes, yet manual categorization remains labor-intensive, inconsistent, and unscalable for higher education institutions. This study aims to develop and evaluate an automated multi-label classification pipeline that maps Indonesian bureaucratic documents to hierarchical compliance codes while maintaining computational efficiency for institutional deployment. A curated dataset of 330 Integrity Zone documents from the Faculty of Mathematics and Natural Sciences, Universitas Negeri Medan, annotated across 82 hierarchical codes, was processed using a frozen IndoBERT encoder to extract 768-dimensional contextual embeddings. These features were classified using a balanced One-vs-Rest Logistic Regression model, with decision thresholds optimized via grid search on a held-out validation set to balance precision and recall. The complete pipeline was deployed as a REST microservice integrated into an existing PHP-based document management system. On a held-out test set of 66 documents not used for training, validation, or threshold selection, the pipeline achieved a Macro F1-score of 0.872, Micro F1-score of 0.894, Hamming Loss of 0.082, and a samples-averaged accuracy of 0.917 (pooled label-wise accuracy 0.918; subset accuracy 0.412). The optimized decision threshold of 0.38 favored recall over the conventional 0.50 cutoff, consistent with the higher institutional cost of missing a relevant compliance code. End-to-end inference latency averaged 2.36 seconds on the deployment server. The proposed pipeline shows practical viability as a decision-support tool for resource-constrained public institutions operating under mandatory human verification; the present evaluation is nonetheless limited by a small held-out test set, and several methodological details are reported in full in the Method section to support reproducibility and to rule out validation leakage.

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Journal Info

Abbrev

sinkron

Publisher

Subject

Computer Science & IT

Description

Scope of SinkrOns Scientific Discussion 1. Machine Learning 2. Cryptography 3. Steganography 4. Digital Image Processing 5. Networking 6. Security 7. Algorithm and Programming 8. Computer Vision 9. Troubleshooting 10. Internet and E-Commerce 11. Artificial Intelligence 12. Data Mining 13. Artificial ...