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The Influence of Profitability on Stock Prices in the Financing Sector Companies Listed on the Indonesia Stock Exchange Akbar, Rayyan Taufik; Wulandari, Retno; Irfan Rizki, Muhammad
Journal of Advances in Accounting, Economics, and Management Vol. 3 No. 1 (2025): September
Publisher : Indonesian Journal Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47134/aaem.v3i1.828

Abstract

Profitability serves as a crucial measure in evaluating a company's financial health, especially within the financing industry listed on the Indonesia Stock Exchange (IDX). This research investigates the impact of Return on Assets (ROA) on the stock prices of financing firms. A quantitative approach was utilized, applying simple linear regression analysis. Data were sourced from annual reports and the official IDX website for the 2020–2023 period, with 24 data points selected using purposive sampling. Classical assumption testing confirmed that the model satisfied the conditions for normality and homoscedasticity. The analysis revealed a significant positive relationship between ROA and stock prices, with a coefficient of 100.070 and an R² of 0.556, meaning ROA accounts for 55.6% of stock price variation. The findings are in line with signaling theory, highlighting ROA as an indicator of company efficiency and stability during uncertain economic conditions. The study suggests that firms should enhance asset utilization to sustain profitability, investors should consider ROA in their evaluations, and future studies should integrate additional financial metrics for a broader analysis.
Forecasting Spare Part pada Commercial Vehicle PT XYZ dengan Klasifikasi ADI-CV Irfan Rizki, Muhammad; Yenny Maya Dora; Wahidiyat Suyudi; Yanthy Mardiana
Statistika Vol. 24 No. 1 (2024): Statistika
Publisher : Department of Statistics, Faculty of Mathematics and Natural Sciences, Universitas Islam Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29313/statistika.v24i1.3546

Abstract

ABSTRAK After Sales memiliki kontribusi positif pada pertumbuhan profit permintaan spare part suatu perusahaan. PT. XYZ merupakan agen tunggal pemegang merek mobil kendaraan niaga di Indonesia dengan visi menjadi market share terbesar secara global dipasar internasional. Peranan penting yang dilakukan PT. XYZ dalam upaya memenuhi seluruh kebutuhan permintaan domestik atau ekspor dengan langkah menerapkan rencana inventaris yang mencakup peramalan kebutuhan suku cadang setiap bulan. Pada kondisi saat ini metode yang digunakan oleh perusahaan hanya menggunakan metode peramalan dengan rata-rata 6 bulan terakhir atau Moving Average yang digunakan untuk menyiapkan seluruh suku cadang PT. XYZ. Metode ini dinilai kurang efektif karena ketika terjadinya bentuk permintaan spare part yang memiliki tingkat variasi tinggi maka penyimpangan pada hasil peramalan menyebabkan back order terhadap pelanggan dan loss sales yang dapat mempengaruhi nilai suatu perusahaan yaitu fast and easy process. Berdasarkan permasalahan tersebut, maka PT. XYZ membutuhkan perbaikan terhadap mekanisme peramalan spare part-nya. Tujuan dari dilakukan penelitian yaitu menghasilkan metode klasifikasi spare part berdasarkan bentuk permintaannya dan memutuskan metode peramalan yang paling tepat untuk masing-masing kelompok spare part dengan langkah membandingkan enam metode peramalan yaitu metode Croston Optimized, TSB, SESOpt, ADIDA, IMAPA, Moving Average. Semua metode peramalan akan dibandingkan atas dasar parameter nilai forecasting error. Pada hasil yang didapat menunjukkan metode Croston Optimized memiliki hasil yang lebih baik dari metode moving average dengan memperbaiki kesalahan sebesar 7%. ABSTRACT After Sales has a positive contribution to the profit growth of a company's spare part demand. PT XYZ is the sole agent of commercial vehicle car brand holders in Indonesia with a vision to become the largest market share globally in the international market. An important role played by PT XYZ in an effort to meet all domestic or export demand needs by implementing an inventory plan that includes forecasting the need for spare parts on a monthly basis. In the current condition, the method used by the company only uses a forecasting method with the average of the last 6 months or Moving Average which is used to prepare all spare parts of PT. XYZ. This method is considered less effective because when there is a form of spare part demand that has a high level of variation, deviations in forecasting results cause back orders to customers and loss of sales which can affect the value of a company, namely fast and easy process. Based on these problems, PT XYZ needs improvements to its spare part forecasting mechanism. The purpose of the research is to produce a spare part classification method based on the form of demand and decide the most appropriate forecasting method for each spare part group by comparing six forecasting methods, namely the Croston Optimized method, TSB, SESOpt, ADIDA, IMAPA, Moving Average. All forecasting methods will be compared on the basis of the forecasting error value parameter. The results obtained show that the Croston Optimized method has better results than the moving average method by correcting an error of 7%.
The Effect of Product Quality, Service, Brand Image, and Availability on Customer Loyalty with Satisfaction as a Mediation Variable (Study at Astra Isuzu Harapan Indah) Irfan Rizki, Muhammad; Munawar, Fansuri
Dinasti International Journal of Economics, Finance & Accounting Vol. 6 No. 4 (2025): Dinasti International Journal of Economics, Finance & Accounting (September - O
Publisher : Dinasti Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.38035/dijefa.v6i4.5105

Abstract

This study examines the effect of product quality, service quality, brand image, and spare part availability on customer loyalty, with customer satisfaction as a mediating variable. The research involved customers of Dealer AI Harapan Indah who had used its services and purchased spare parts in the past two years. A quantitative approach was applied using purposive sampling of 300 respondents, and data were analyzed with the Structural Equation Modeling Partial Least Squares (SEM-PLS) method. The results indicate that product quality (p-value= 0.000), service quality (p-value = 0.004), brand image (p-value = 0.010), and spare part availability (p-value = 0.001) have significant positive effects on customer satisfaction. Customer loyalty is directly influenced by product quality (p-value = 0.026) and customer satisfaction (p-value = 0.004), while spare part availability, service quality, and brand image affect loyalty indirectly through satisfaction. Product quality is the most dominant factor in shaping loyalty, aligning with commercial vehicle users’ emphasis on reliability and durability. These findings underscore the importance of improving product reliability, ensuring consistent after-sales service, maintaining brand perception, and securing sustainable spare part availability to strengthen long-term customer loyalty.