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All Journal JMD: Jurnal Riset Manajemen & Bisnis Dewantara Jurnal Pengabdian Masyarakat dan Riset Pendidikan
Iwan Supriyanto
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Humanities Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Languange, Linguistic, Communication & Media Mathematics Other

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Pengaruh Harga dan Kualitas Produk Sebagai Faktor Keputusan Pembelian Iphone di Kalangan Mahasiswa/I UBSI Kampus Kalimalang : Penelitian Iwan Supriyanto; Aprilia Istiqomah; Cindy Dwi Hardiyanti; Sindy Aditya Putry
Jurnal Pengabdian Masyarakat dan Riset Pendidikan Vol. 4 No. 1 (2025): Jurnal Pengabdian Masyarakat dan Riset Pendidikan Volume 4 Nomor 1 (Juli 2025 -
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jerkin.v4i1.1777

Abstract

Penelitian ini bertujuan untuk mengetahui pengaruh harga dan kualitas produk terhadap keputusan pembelian iPhone di kalangan mahasiswa/i Universitas BSI Kampus Kalimalang. Metode penelitian yang digunakan adalah kuantitatif dengan pendekatan asosiatif. Pengumpulan data dilakukan melalui kuesioner dan dianalisis menggunakan regresi linier berganda dengan bantuan software SPSS. Hasil penelitian menunjukkan bahwa harga dan kualitas produk secara parsial maupun simultan berpengaruh signifikan terhadap keputusan pembelian. Nilai koefisien determinasi (R²) sebesar 67,1% menunjukkan bahwa harga dan kualitas produk memberikan kontribusi besar terhadap keputusan pembelian, sedangkan sisanya dipengaruhi faktor lain di luar penelitian. Temuan ini memberikan implikasi bagi perusahaan untuk terus menjaga kualitas produk dan mengelola strategi harga agar sesuai dengan persepsi nilai mahasiswa sebagai konsumen.
EVALUASI AKURASI PERAMALAN PENJUALAN DENGAN METODE SEMI AVERAGE DAN LEAST SQUARE PT INDOFOOD SUKSES MAKMUR Tbk Widianingrum, Enggar; Iwan Supriyanto
JMD : Jurnal Riset Manajemen & Bisnis Dewantara Vol. 8 No. 2 (2025): Juli (2025) - Desember (2025)
Publisher : STIE PGRI Dewantara Jombang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26533/jmd.v8i2.1447

Abstract

This study aims to analyze sales forecasting at PT Indofood Sukses Makmur Tbk. using the Semi Average and Least Square methods in order to identify historical sales patterns and measure prediction accuracy for the upcoming period. The research employs a descriptive quantitative approach with the population consisting of PT Indofood Sukses Makmur Tbk.’s financial statements for the period 2020–2024, while the sample is the net sales data taken from the company’s annual income statements. The analysis was carried out using the Semi Average and Least Square methods, with accuracy evaluated through Mean Squared Error (MSE) and Mean Absolute Percentage Error (MAPE). The results indicate that the Semi Average method produced an MSE value of 48,080,998,381.43 and a MAPE of 213.26%, while the Least Square method yielded an MSE of 6,971,891,696.24 and a MAPE of 66.67%. These findings suggest that the Least Square method provides a more representative forecasting model compared to the Semi Average method, although the overall forecasting accuracy remains relatively low. This research highlights the necessity of applying more advanced and adaptive forecasting models in the future to support more effective managerial decision-making.
Co-Authors Aprilia Istiqomah Cindy Dwi Hardiyanti Enggar Widianingrum Sindy Aditya Putry