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All Journal Jurnal Matematika E-Jurnal Matematika
Ratna Sari Widiastuti
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Mathematics

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ANALISIS PERBANDINGAN METODE EXPONENTIAL APPROACH DAN METODE IMPROVED ZERO POINT UNTUK MEMINIMUMKAN BIAYA PENDISTRIBUSIAN NI KADEK JIANTARI; G.K. GANDHIADI; RATNA SARI WIDIASTUTI
E-Jurnal Matematika Vol 11 No 3 (2022)
Publisher : Mathematics Department, Faculty of Mathematics and Natural Sciences, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/MTK.2022.v11.i03.p378

Abstract

The purpose of this study is to do a comparative of the minimum cost of distributing mountea drinks using the exponential approach and the improved zero point method. The exponential approach method is a direct method where the allocation in this method depends on the number of zeros that appear in the transportation table. In the case of an unbalanced transportation problem, a dummy line (column) will appear where the cost on the line (column) is zero, which will greatly affect the optimum results of the given exponential approach method. The improved zero point method is an improved method from the zero point method, which is very useful for solving all types of transportation problems. This method provides an optimal solution without the help of other modified methods. Based on the results of the research, it was shown that the distribution cost of mountea drinks from the wholesale center in the Lunyuk sub-district using an exponential approach and an improved zero point obtained a cost of 10,392,276 Rupiah before the optimization, while the while the comparative distribution cost of the mountea drinks from the wholesale center in the Lunyuk sub-district after the optimization using an exponential approach and an improved zero point obtained a cost same of 8.552.560 Rupiah.
PENERAPAN METODE SAFETY FIRST CRITERION PADA SELEKSI SAHAM UNTUK PEMBENTUKAN PORTOFOLIO OPTIMAL HAMITA HAKMI; KOMANG DHARMAWAN; RATNA SARI WIDIASTUTI
E-Jurnal Matematika Vol 12 No 2 (2023)
Publisher : Mathematics Department, Faculty of Mathematics and Natural Sciences, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/MTK.2023.v12.i02.p406

Abstract

The formation of an optimal portfolio can be done with the Safety First Criterion method which is based on down side risk, namely the risk of causing a loss. The purpose of this study is to determine the optimal portfolio using Safety First Criterion method. Safety first criteria for portfolio selection are concerned only with the risk of failing to achieve a criteria minimum target return or secure prespecified safety margins. There are three criteria for the Safety First, namely Roy, Kataoka and Telser criteria. The results of this study formed an optimal portfolio with different risk values the Roy criteria is 0.0486, Kataoka is 0.0487 and Telser is 0.0527. So that the best portfolio of the three criteria is Roy's criterion because it has the lowest risk value with expected return the same.
Co-Authors G. K. Gandhiadi HAMITA HAKMI Ida Ayu Putu Ari Utari Komang Dharmawan NI KADEK JIANTARI