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PEMODELAN PREMI ASURANSI BERDASARKAN DATA SEVERITY MENGGUNAKAN MODEL LOGNORMAL Cahyaning Baiti, Putri Isnaini; Annisa Hevita G.K.S; Karina Sylfia Dewi; Nanda Azzanina
Nusantara Hasana Journal Vol. 5 No. 3 (2025): Nusantara Hasana Journal, August 2025
Publisher : Yayasan Nusantara Hasana Berdikari

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59003/nhj.v5i3.1603

Abstract

The insurance industry in Indonesia requires reliable quantitative approaches to accurately determine premium rates and manage claim risks effectively. This study aims to model pure insurance premiums based on claim severity data using the lognormal regression approach. The data used consist of historical individual claim amounts (severity) obtained from a general insurance company in Indonesia, covering the period from 2009 to 2015. Initial data exploration revealed that the distribution of claim values is positively skewed, indicating the suitability of lognormal modeling. Three models were evaluated: Generalized Linear Model (GLM) with Gamma distribution, GLM with Inverse Gaussian distribution, and linear regression with lognormal transformation. Model selection was based on the Akaike Information Criterion (AIC) and Bayesian Information Criterion (BIC). The results show that the lognormal model had the lowest AIC and BIC values, indicating superior performance compared to the other models. The selected model was then used to forecast pure premiums for the next 12 months, followed by the calculation of commercial premiums with a 30% loading factor. The prediction results show a consistent and proportional upward trend in premiums, demonstrating the model’s effectiveness in capturing historical claim patterns and supporting data-driven premium setting.
Implementation of Cheng’s Fuzzy Time Series Method for Rice Price Forecasting Rosni, Rosni; Afifathuzahwa, Fauziah; Sylfia Dewi, Karina; Cahyaning Baiti, Putri Isnaini; Azzanina, Nanda
bit-Tech Vol. 8 No. 3 (2026): bit-Tech
Publisher : Komunitas Dosen Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32877/bt.v8i3.3700

Abstract

Indonesia is an agricultural country where rice is the primary staple and plays a crucial role in maintaining economic stability. However, rice price fluctuations, driven by internal and external factors, often create uncertainty for both producers and consumers. Therefore, accurate forecasting of rice prices is essential to support effective food price monitoring and policy planning. This study aims to forecast rice prices in Bandung City using Cheng’s Fuzzy Time Series (FTS) method. The novelty of this study lies in applying the Cheng FTS approach to analyze recent monthly rice price data and evaluate its forecasting performance in capturing short-term price fluctuations. The dataset consists of monthly average rice prices in Bandung City from January 2022 to June 2025, obtained from the Consumer Price Survey (SHK) published by the Badan Pusat Statistik (BPS). The modeling process involves data preprocessing, interval determination, fuzzification, construction of fuzzy logical relationships, and defuzzification to generate forecasting values. Forecasting performance is evaluated using the Mean Absolute Percentage Error (MAPE). The experimental results show that the Cheng FTS model achieved an MAPE value of 1.54%, indicating very high forecasting accuracy. The predicted rice prices closely track actual price movements, with the average forecast for the next period at Rp15,719. These findings demonstrate that the Cheng Fuzzy Time Series method delivers reliable forecasting performance and can serve as an alternative approach for predicting rice price movements. Furthermore, the proposed model may provide policymakers and related stakeholders with useful insights to support rice price monitoring and stabilization strategies in Bandung City.