Agung Dharmawan Buchdadi
Faculty of Economics Universitas Negeri Jakarta, Indonesia

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Segmenting Walmart Customers for Personalized Marketing Strategies Using MiniBatchKMeans Clustering and Decision Trees: An Analysis of Purchasing Behavior Agung Dharmawan Buchdadi
Journal of Digital Market and Digital Currency Vol. 1 No. 3 (2024): Regular Issue December 2024
Publisher : Bright Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47738/jdmdc.v1i3.18

Abstract

This study explores the application of MiniBatchKMeans clustering and decision tree analysis to segment Walmart customers for personalized marketing strategies. Using a dataset of 550,068 customer transactions, including variables such as User_ID, Product_ID, Gender, Age, Occupation, City_Category, Stay_In_Current_City_Years, Marital_Status, Product_Category, and Purchase, we identified five distinct customer segments. These segments were characterized by unique demographic and purchasing behaviors. Segment 1 included older customers (mean age: 55+) with high and consistent spending, primarily on premium products. Segment 2 comprised middle-aged customers (mean age: 36-45) with moderate to high spending levels, favoring household and family-related products. Segment 3 consisted of young adults (mean age: 18-25) with variable purchasing patterns, focusing on low to mid-range priced items. Segment 4 included young families (mean age: 26-35) with significant spending on a variety of products, and Segment 5 featured middle-aged to older customers (mean age: 46-55) with steady but moderate spending habits. The MiniBatchKMeans clustering algorithm effectively handled the large dataset, identifying clear customer segments. Decision tree analysis provided insights into the key features driving each segment, with Purchase amount, Age, and Occupation being the most significant. The decision tree model achieved an accuracy of 100%, with precision, recall, and f1-scores of 1.00 for all segments, indicating robust classification. These findings have significant implications for personalized marketing strategies. For instance, premium product promotions can be directed at high-spending older customers, while family-oriented discounts and bundles can be tailored for young families. Digital marketing efforts can be optimized to engage younger segments through social media and personalized recommendations. This study highlights the importance of data-driven decision-making in retail, emphasizing the need for continuous data collection and analysis to stay competitive. Future research should incorporate datasets from different retail contexts and explore alternative clustering techniques and additional features to provide a more holistic view of customer segmentation.
Anomaly Detection in Open Metaverse Blockchain Transactions Using Isolation Forest and Autoencoder Neural Networks Agung Dharmawan Buchdadi; Ammar Salamh Mujali Al-Rawahna
International Journal Research on Metaverse Vol. 2 No. 1 (2025): Regular Issue March 2025
Publisher : Bright Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47738/ijrm.v2i1.20

Abstract

The study explores anomaly detection in blockchain transactions within the Open Metaverse, utilizing Isolation Forest and Autoencoder Neural Networks. With the rise of the Metaverse, blockchain technology has become essential for secure digital transactions. However, the decentralized nature of blockchain makes it vulnerable to various anomalies, potentially undermining trust and security in digital spaces. Isolation Forest, an unsupervised machine learning algorithm, isolates anomalies based on the assumption that anomalies are few and distinct from regular data points. Its effectiveness in handling high-dimensional data makes it suitable for real-time applications. On the other hand, Autoencoders, a type of neural network, excel in detecting anomalies through reconstruction error, identifying data points that deviate from normal patterns. The research applied these models to a simulated dataset from the Open Metaverse, including features like transaction amount, login frequency, and session duration, to capture nuanced user behaviors. Preprocessing steps, such as one-hot encoding for categorical features and standardization for numerical features, ensured data consistency for accurate modeling. The Isolation Forest achieved a precision of 0.85, while the Autoencoder slightly outperformed it with a precision of 0.87. Both models demonstrated strong AUC-ROC values, with the Autoencoder scoring 0.85 compared to Isolation Forest’s 0.82, indicating robust performance in distinguishing normal from anomalous transactions. The findings underscore the potential of both models to enhance security in blockchain-based virtual environments, with the Autoencoder showing an edge in handling complex data patterns. However, the use of simulated data presents limitations, suggesting the need for further testing with real-world Metaverse transaction data. Future research could explore integrating other advanced algorithms, such as Graph Neural Networks, to improve anomaly detection in blockchain systems.