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All Journal Jurnal Informatika dan Rekayasa Perangkat Lunak Prosiding Seminar Nasional Sisfotek (Sistem Informasi dan Teknologi Informasi) Journal of Artificial Intelligence and Engineering Applications (JAIEA) Sintek Kuwera
Willy Prihartono
Unknown Affiliation
Automotive Engineering Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering

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Naive Bayes Classifier untuk Analisis Sentimen Ulasan Pelanggan pada Domo Coffee and Resto Puji Hartini; Nana Suarna; Willy Prihartono
Jurnal Informatika dan Rekayasa Perangkat Lunak Vol 6, No 1 (2024): Maret
Publisher : Universitas Wahid Hasyim

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36499/jinrpl.v6i1.10315

Abstract

Domo Coffee and resto is one of the well-known cafes located on Jl. DR Sudarsono No.45 Kesambi, Kesambi District, Cirebon City. Domo Coffee and Resto has a variety of food and drinks served and the place is designed to be beautiful and comfortable to visit for various purposes. Of course, there are many kinds of problems related to unsatisfactory service, uncomfortable atmosphere or bad taste of food as well as several other disappointments and dissatisfaction that give rise to negative comments or reviews. Café Domo often receives mixed reviews from customers on the Google review platform. This research aims to analyze the sentiment of customer reviews on Domo Coffee and restaurant and will be completed using the Naïve Bayes Classifier method, namely a classification method based on Bayes' theorem. In this research, based on the author's understanding of sentences regarding sentiment analysis, the author received 374 positive reviews and 58 negative reviews regarding food. 469 positive reviews and 40 negative reviews regarding the atmosphere and 253 positive reviews and 99 negative reviews regarding the service. The highest number of positive comments was obtained by the atmosphere aspect with 469 reviews and the highest negative comments were obtained by the service aspect with 99 reviews. In testing the split data values of 0.8 and 0.2, the highest accuracy was obtained by the service technician with an accuracy of 98.22%, precision of 97.58%, recall of 100% and an F1-score value of 98.78%. The results of this research provide in-depth insight into customers' views of Domo cafe. Cafe owners and stakeholders can use these findings to understand aspects that need to be improved or improved.
Analisa Pengaruh Jumlah Penerima dan Penyaluran Pinjaman melalui Finansial Teknologi (fintech) terhadap Pertumbuhan Ekonomi Masyarakat melalui Regresi Linear Sri Farida Utami; Willy Prihartono; Mohamad Alif Dzikry
Prosiding SISFOTEK Vol 8 No 1 (2024): SISFOTEK VIII 2024
Publisher : Ikatan Ahli Informatika Indonesia

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Abstract

This study looks into the relationship between the number of loans received and the amount funnelled by the technology financial platform and the economic growth of a population. Fintech. The method used in this study is linear regression. In recent years, fintech has grown to be a significant component of the financial system, particularly in emerging nations like Indonesia where traditional financial services are still unavailable. The study begins with the hypothesis that fintech can improve financial inclusion; theoretically, this will raise economic growth by improving the distribution of financial resources and the ease with which credit can be obtained. Important variables that were examined in the study were the total number of borrowers, the distribution of loans overall, and measures of economic growth. The outcomes of the linear regression demonstrated a strong positive association between the quantity of borrowing, the availability of fintech loans, and the population's economic expansion. The report emphasizes the significance of rules that enable healthy and inclusive fintech growth and offers pertinent policy implications for decision-makers and players in the fintech industry. The study's finding supports the claim that, by facilitating better access to credit and a more fair distribution of credit, fintech may significantly contribute to economic growth. According to the report, in order to maximize fintech's beneficial effects on the economy, policies that foster its growth are necessary.
Application of K-Means for Product Grouping Best Sellers at Planet Tire Jatibarang Branch Risnawati; Rini Astuti; Willy Prihartono
Journal of Artificial Intelligence and Engineering Applications (JAIEA) Vol. 4 No. 2 (2025): February 2025
Publisher : Yayasan Kita Menulis

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59934/jaiea.v4i2.845

Abstract

This research aims to identify the best-selling products at Planet Tire Workshop Jatibarang Branch using the K-Means Clustering method. Understanding product sales patterns is important in designing effective marketing strategies and managing stock efficiently. This research uses sales transaction data for one year, including the number of sales, product types, and total transaction value. The analysis process includes data preprocessing, selection of relevant attributes, application of the K-Means algorithm, and validation of the optimal number of clusters with the Elbow method. As a result, products were grouped into three categories: high, medium, and low sales. The high sales cluster contributes significantly to revenue, while the medium sales cluster shows potential for improvement through promotion, and the low sales cluster requires further evaluation. This research helps management manage stock, prioritize promotions, and optimize resource allocation. However, the research has limitations as it has not considered external factors such as seasonal trends and promotions, and focuses on one branch. Development of the research in other branches can expand its benefits. The results of this study are expected to improve operational efficiency, support data-driven strategies, and enrich academic literature related to the application of K-Means in retail management and sales data analysis.
Model Machine Learning Untuk Prediksi Risiko Penyakit Liver Dengan Random Forest Teroptimasi Rizky Andrea Arifa; Nana Suarna; Agus Bahtiar; Nining Rahaningsih; Willy Prihartono
Jurnal Sistem Informasi dan Teknologi Vol 6 No 1 (2026): Jurnal Sistem Informasi dan Teknologi (SINTEK)
Publisher : LPPM STMIK KUWERA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56995/sintek.v6i1.204

Abstract

Penyakit liver merupakan salah satu kondisi kronis dengan tingkat mortalitas tinggi, sehingga diperlukan pendekatan prediksi yang akurat untuk mendukung deteksi dini. Penelitian ini bertujuan mengembangkan model machine learning untuk memprediksi risiko penyakit liver menggunakan algoritma Random Forest yang dioptimalkan dengan RandomizedSearchCV. Dataset yang digunakan terdiri dari 1.700 entri yang mencakup variabel klinis dan gaya hidup, termasuk usia, jenis kelamin, BMI, konsumsi alkohol, kebiasaan merokok, riwayat genetik, aktivitas fisik, diabetes, hipertensi, serta hasil Liver Function Test. Proses penelitian meliputi preprocessing, normalisasi skala, pembagian data menggunakan train-test split 80:20, pembangunan model baseline, dan optimasi hiperparameter. Hasil eksperimen menunjukkan bahwa optimasi menghasilkan peningkatan performa model, dengan akurasi 0.91, peningkatan recall sebesar 3.20%, dan AUC-ROC mencapai 0.96. Analisis feature importance menunjukkan bahwa LiverFunctionTest, BMI, dan AlcoholConsumption merupakan fitur paling berpengaruh terhadap prediksi risiko penyakit liver. Dengan demikian, Random Forest teroptimasi terbukti efektif dalam menghasilkan model prediksi yang akurat dan dapat digunakan sebagai alat pendukung keputusan dalam deteksi dini penyakit liver.
Segmentation of Coffee Purchasing Behavior Based on Transaction Time Using the K-Means Algorithm Yuslia Devitri; Nining Rahaningsih; Irfan Ali; Willy Prihartono
Journal of Artificial Intelligence and Engineering Applications (JAIEA) Vol. 5 No. 2 (2026): February 2026
Publisher : Yayasan Kita Menulis

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59934/jaiea.v5i2.1863

Abstract

This studyaims to identify customer behavior patterns based on the time of purchaseof beverages at a coffee shop using the K-Means method.Transaction data includes purchase time, payment type, product name,time category, day, and month. The research stages include data cleaning, time attribute transformation, and numerical feature normalization. The optimal number of clustersis determined through testing k = 2–10 with four evaluation metrics,namely Inertia, Silhouette Score, Davies–Bouldin Index, and Calinski–HarabaszIndex. Based on the validation results, k = 3 was selected because it provided the best balancebetween compactness and cluster separation. The clustering results showedthree main customer groups based on transaction time trends:nighttime buyers with a peak around 10:27 p.m., afternoon to early evening buyerswith a centroid of 7:01 p.m., and morning to noon buyers with a centroid11:13. The frequency distribution indicates that the morning–afternoon buyer groupis the largest, while the early evening–night group is thesmallest. Visualization of scatter plots, boxplots, and time category graphsemphasizes the differences in characteristics between clusters. Overall,this study proves that K-Means is effective in mapping the temporal patternsof customer behavior. These findings can be used to develop time-based marketing strategies, operational arrangements, and product stock management,as well as form the basis for further analysis in the industry.
Co-Authors agus bahtiar Irfan Ali Mohamad Alif Dzikry Nana Suarna Nining Rahaningsih Puji Hartini Rini Astuti Risnawati Rizky Andrea Arifa Sri Farida Utami Yuslia Devitri