Detection of fraudulent financial statement using Ann And Smote under imbalanced data

Young, Yosua (2023) Detection of fraudulent financial statement using Ann And Smote under imbalanced data. Masters thesis, Universitas Pelita Harapan.

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Abstract

This study aims to create a model to detect fraudulent financial statements. Previous study has been conducted and showcased the ability of supervised learning in identifying fraudulent financial statements. However, those studies generally show its effectiveness on a balanced dataset, where it is frequently found that fraud datasets are presented as imbalanced. This can potentially lead to a model that is inadequately trained with fraud characteristics, which is the minority class. This study employs artificial neural networks, specifically feedforward neural networks to perform binary classification. Using previous research dataset that shows severe imbalance dataset, which fraud samples only represented by 0.67% from the population, SMOTE is employed. SMOTE is used to oversample the minority class, hence generating additional samples and creating a balance dataset. This study finds that artificial neural networks is able to identify fraudulent financial statements in a severe imbalance dataset. Found in literature as benchmark, the best results of the proposed model show an AUC score and precision rate of 70.6% and 2.89%, respectively, in comparable to existing models, and sensitivity rate of 83% outperforms all the existing models. The proposed model offers reliable assurance for regulators or auditors with a low risk of false negatives, hence, ensure practical utility and maintain confidence. / Penelitian ini bertujuan untuk membuat sebuah model yang dapat mendeteksi kecurangan pelaporan keuangan. Penelitian sebelumnya menunjukkan kemampuan pemelajaran terarah (supervised learning) dalam mendeteksi kecurangan pelaporan keuangan. Namun, penelitian tersebut umumnya menunjukkan efektivitasnya pada dataset yang seimbang, dimana seringkali ditemukan bahwa dataset terkait kecurangan pelaporan keuangan disajikan dalam bentuk tidak seimbang. Hal ini dapat berpotensi menyebabkan model tidak cukup terlatih menghadapi karakteristik kecuarangan pelaporan keuangan, yang dalam kasus dimana data tidak seimbang, kecurangan termasuk ke dalam kelas minoritas. Penelitian ini menggunakan jaringan saraf tiruan (artificial neural networks), khususnya feedforward networks untuk melakukan klasifikasi biner. Menggunakan dataset dari penelitian sebelumnya yang menunjukkan ketidakseimbangan yang tinggi, dimana sampel kecurangan pelaporan keuangan hanya diwakili oleh 0,67% dari populasi, SMOTE digunakan. SMOTE digunakan untuk meningkatkan jumlah sampel dari kelas minoritas, sehingga menghasilkan sampel tambahan dan menciptakan dataset yang seimbang. Penelitian ini menemukan bahwa jaringan saraf tiruan mampu mengidentifikasi kecurangan pelaporan keuangan dalam dataset yang tidak seimbang. Menggunakan literatur sebagai tolak ukur, hasil terbaik dari model yang diusulkan menunjukkan skor AUC dan tingkat precision sebesar 70.6% dan 2.89%, berturut-turut, dibandingkan model yang ada, dan tingkat sensitivity sebesar 83% melebihi semua model yang ada. Model yang diusulkan menawarkan asurans yang dapat diandalkan untuk regulator dan auditor dengan risiko rendah terjadinya false negative, dengan demikian, memastikan kegunaan praktis dan mampu menjaga kepercayaan.
Item Type: Thesis (Masters)
Creators:
Creators
NIM
Email
ORCID
Young, Yosua
NIM01679210013
youngyosua911@gmail.com
UNSPECIFIED
Contributors:
Contribution
Contributors
NIDN/NIDK
Email
Thesis advisor
Tjahyadi, Hendra
NIDN0410076901
hendra.tjahyadi@uph.edu
Uncontrolled Keywords: artificial neural networks ; fraudulent financial statements ; smote ; supervised learning
Subjects: Q Science > QA Mathematics > QA75 Electronic computers. Computer science
Divisions: University Subject > Current > Faculty/School - UPH Karawaci > School of Information Science and Technology > Master of Informatics
Current > Faculty/School - UPH Karawaci > School of Information Science and Technology > Master of Informatics
Depositing User: Users 23181 not found.
Date Deposited: 20 Feb 2024 01:26
Last Modified: 20 Feb 2024 01:26
URI: http://repository.uph.edu/id/eprint/62267

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