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All Journal JURNAL PEMBELAJARAN DAN MATEMATIKA SIGMA (JPMS) Jurnal Absis : Jurnal Pendidikan Matematika dan Matematika NUCLEUS: Jurnal Sains dan Teknologi
Purba, Switamy Angnitha
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Chemistry Computer Science & IT Education Library & Information Science Materials Science & Nanotechnology Mathematics Physics

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Optimisasi Program Linear Pada Permasalahan Multikriteria Menggunakan Metode ε-constraint Purba, Switamy Angnitha; Afandi, Trisno; Fadhillah, Dinda Rizka; Wahyuni, Sri; Januarti, Ria
JURNAL PEMBELAJARAN DAN MATEMATIKA SIGMA (JPMS) Vol 9, No 2 (2023)
Publisher : Fakultas Keguruan dan Ilmu pendidikan (FKIP) Universitas Labuhan Batu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36987/jpms.v9i2.4274

Abstract

The purpose of this study is to solve multi-criteria problems using the ε-constraint method with the help of an excel solver. The multi-criteria optimization problem is an optimization problem that has more than one objective function. A multi-criteria optimization problem can be said to be a multiple criteria decision making (MCDM) if there is more than one thing that must be considered in the model as a goal or criterion. In general, the weighting method and the ε-constraint method are the most widely used. The weighting method converts a set of options into options by multiplying each option by the inventory weight. On the other hand, the ε-constraint method only saves one of the existing goals and limits the goals with a certain number of values to get an efficient limit.
Pembuatan Balsem Aromaterapi dari Minyak Atsiri Sereh Wangi (Cymbopogonnardus L. Rendle) Sylvi, Sylvi; Nelza, Novia; Purba, Switamy Angnitha
NUCLEUS Vol 4 No 2 (2023): NUCLEUS
Publisher : Neolectura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37010/nuc.v4i2.1368

Abstract

Essential oils are volatile oils or oil fly that is generally tangible fluid obtained from the plant roots, bark, stems, and leaves by steam distillation of water. Plants containing essential oils and has the potential to be developed is a plant citronella (Cymbopogon nardus L. Rendle). The purpose of this study to make products balm aromatherapy essential oils of citronella and test the quality of quality of the aromatherapy balm with water vapor distillation method. The collection of data obtained from the analysis is the analysis parameter identification of compounds, numbers ester, test Total Plate Count, testing Pb method of AAS, the, determination of the refractive index, the determination viksositas, determination of pH balm, and a test of endurance balm, saponification, test molds, metal test Cu and specific gramavity test, and analysis of quality parameters of essential oil (yield and organoleptic tests). Results of analysis of parameter numbers ester (17.6177; 17.7824; 18.5295), test Total Plate Count (0; 3 × 102 and 3 × 102), Pb metal test methods AAS (0.02895; 0.0145; 0.01445), the identification of compounds (+), 1.4675 refractive index, viksositas 439,89cp, 436,01cp, 419,57cp, pH 6 balm, balm endurance test, saponification 11:04; 16.66; 16.76, mold testing namely (-), Cu metal test 0.1743; 0.5242; 0.0222, testing the specific gramavity is 0898; 0.922; 0901. The result of the isolation of essential oils of citronella 27,000 gramam sample was obtained ± 62 mL with the results of citronella essential oil yield of 0.23% v / b; the identification of essential oils generally exhibit containing citronella essential oil.
Analisis Jaringan Kerja dengan Metode Critical Path Method (CPM) dan Model Program Linier Purba, Switamy Angnitha
Jurnal Absis: Jurnal Pendidikan Matematika dan Matematika Vol. 4 No. 1 (2021): Jurnal Absis
Publisher : Program Studi Pendidikan Matematika Universitas Pasir Pengaraian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30606/absis.v4i1.993

Abstract

Network analysis is part of a project that requires time for each network activity. To produce a particular project there is more than one job/event that must be done. Each job/event is interconnected and placed in order according to the management of its implementation. In network projects, it is necessary to plan and supervise systematically, in order to obtain work efficiency. The network is represented in symbols and arrows. In this study, the problem-solving network analysis was solved using the CPM (Critical Path Method) method and with a linear programming model using the help of excel-solver and Lingo. This study aims to compare the two methods in solving network analysis problems. Based on the analysis, it is found that by using the CPM method, more critical paths are obtained than the linear programming method. With the increasing number of critical paths obtained, it is hoped that the management can determine project priorities to maintain the project schedule to be completed on time.
Co-Authors Afandi, Trisno Fadhillah, Dinda Rizka Januarti, Ria Nelza, Novia Sri Wahyuni Sylvi, Sylvi