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Evaluation of Outlier Detection Methods for Anomaly Detection in Journal Entries: A Use Case Analysis

In: Digital Innovation and Organizational Transformation

Author

Listed:
  • Tobias Schreier

    (Hamburg University of Applied Sciences)

  • Nicolai Gnoss

    (Hamburg University of Applied Sciences)

  • Marina Tropmann-Frick

    (Hamburg University of Applied Sciences)

  • Martin Schultz

    (Hamburg University of Applied Sciences)

Abstract

Detecting anomalous journal entries in a company’s general ledger is essential for external auditors. An increasing trend employs outlier detection (OD) methods, especially machine learning methods, for anomaly detection in journal entry data. Recent research often lacks comparative analysis of OD methods. Thus, this study provides a comparative analysis of OD methods for journal entry anomaly detection using real-world accounting data. Additionally, in the context of domain-specific data preprocessing, we give special consideration to the amount, due to its importance for auditors. This yields three different dataset variants. We conduct our analysis based on three example accounts manually labeled by external auditors. Autoencoders, clustering-based local outlier factor (CBLOF), and histogram-based outlier score (HBOS) consistently outperform other methods across different accounts and dataset variants. With the provided results, this research enhances the understanding and applicability of OD methods for journal entry anomaly detection.

Suggested Citation

  • Tobias Schreier & Nicolai Gnoss & Marina Tropmann-Frick & Martin Schultz, 2026. "Evaluation of Outlier Detection Methods for Anomaly Detection in Journal Entries: A Use Case Analysis," Lecture Notes in Information Systems and Organization, in: Christoph M. Flath & Gunther Gust & Frédéric Thiesse & Axel Winkelmann (ed.), Digital Innovation and Organizational Transformation, pages 345-359, Springer.
    • Handle: RePEc:spr:lnichp:978-3-032-08483-5_22
    DOI: 10.1007/978-3-032-08483-5_22
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