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All Journal JURNAL PENELITIAN PENDIDIKAN MIPA Journal Of Management Science (JMAS) Majalah Ilmiah Warta Dharmawangsa Jurnal Sains Riset JURNAL ABDIMAS TRIDHARMA MANAJEMEN Jurnal Real Riset Education Enthusiast : Jurnal Pendidikan dan Keguruan JoEMS : Journal of Education and Management Studies Pedagogy : Jurnal Pendidikan Matematika Jurnal Penelitian Pendidikan MIPA INTERNATIONAL JOURNAL OF ECONOMIC LITERATURE Jurnal Rekayasan Lingkungan dan Biosistem
hery saputra
Program Studi Pendidikan Matematika, Universitas Jabal Ghafur, Sigli
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Environmental Science Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Physics Social Sciences Other

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OPTIMIZATION OF PRICING AND COST PLANNING USING LINEAR FUNCTIONS: AN ECONOMIC MATHEMATICS PERSPECTIVE ON FINANCIAL STRATEGY AT CAKE MY DAY Hery Saputra; Nina Zakiah; Nurina Happy
INTERNATIONAL JOURNAL OF ECONOMIC LITERATURE Vol. 3 No. 2 (2025): February
Publisher : Adisam Publisher

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Abstract

Pricing and cost planning are critical aspects of business management, especially for small enterprises like the "Cakemyday" cake shop. Proper financial planning ensures sustainability and profitability in a competitive market. This study aims to analyze the financial feasibility of "Cakemyday" by calculating the Break-Even Point (BEP) and determining the optimal selling price based on cost structures and demand functions.A quantitative approach was employed, utilizing financial data, including fixed costs, variable costs, and demand function analysis. The BEP calculation determined the minimum number of units required to cover all expenses, while the demand function was derived from historical pricing and sales data to understand consumer behavior.The findings indicate that "Cakemyday" needs to sell 78 units to reach BEP, with a contribution margin of Rp 90,000 per unit. Furthermore, to achieve a profit target of Rp 3,000,000, an optimal selling price of approximately Rp 188,000 per unit was determined. The demand function analysis revealed a negative correlation between price and quantity demanded, supporting strategic pricing decisions.The study concludes that understanding financial metrics and consumer behavior is essential for sustainable business growth. It is recommended that "Cakemyday" implement targeted marketing strategies and monitor pricing dynamics to enhance profitability. Future research may explore external factors affecting demand and conduct comparative studies with similar businesses.
Analysis of Trichoderma Application as a Biofertilizer in the Concept of Sustainable Agriculture through Endophytic Microbes Zulaika, Aidha; Taniwiryono, Darmono; Hidayat, YS; Saputra, Hery
Jurnal Rekayasa Lingkungan dan Biosistem Vol. 1 No. 1 (2023)
Publisher : Universitas Ibn Khaldun Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32832/relibi.v1i1.420

Abstract

Endophytic microbes are microbes capable of colonizing and symbiotic with plant tissues. Trichoderma has been known as an endophytic fungus with a symbiotic relationship of mutualism including root colonization by helping root growth, nutrient absorption and resistance to stress and pathogens. This study consists of two steps, namely: (1) isolation and identification of Trichoderma, (2) endophytic test of Trichoderma isolate by root staining method and plant root culture. Seven isolates were shown to result in better plant growth and plant roots. Based on plant root culture tests, it was found that all plants contained Trichoderma, but based on T. Koningii and T. Polysporum root staining tests. It cannot be certain to colonize the root tissue of test plants. Based on the test results, Trichoderma has the potential to be a biological fertilizer (Biofertilizer) that can help optimal plant growth and can be applied in agriculture that applies the concept of sustainability.
Participatory Approach in Mapping and Stakeholder Involvement for Ciliwung River Sustainability Wibowo, Rimun; Ismail, Gunawan; Susetyo, Budi; Dwikorawati, Syarifah Sofiah; rahma, Sukma Laksita; Saputra, Hery; Sidik, Sahul; Saripudin, Usep
Jurnal Rekayasa Lingkungan dan Biosistem Vol. 2 No. 1 (2024): Jurnal Relibi Vol.2 No.1 2024
Publisher : Universitas Ibn Khaldun Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32832/relibi.v2i1.924

Abstract

The Ciliwung River, one of the large rivers in Indonesia, has experienced damage in the upstream area from waste pollution, landfills, and environmental damage. The Ciliwung watershed has experienced shallowing and is often affected by foam. There are many stakeholders who are concerned and have carried out many caring actions, including the Ciliwung Care Community (KPC) in Kedung Halang District, Bogor City. Therefore, this situation must be resolved properly, immediately, and sustainably. Stakeholders who have potential for the development and sustainability of the Ciliwung River are formulated through focus group discussions and divided based on stakeholder quadrants. Activities that can be carried out as a follow-up to stakeholder mapping and engagement are workshops inviting all stakeholders to present the existing conditions of each segment of the Ciliwung River so that sustainability activities can be formulated that can be implemented through support between stakeholders.
Environmental Carrying Capacity and Load Capacity Determination System for Ecosystem Services Management Saputra, Hery; Tri Hartono, Tjahjo; Susetyo, Budi; Ningrum, Almyanti
Jurnal Rekayasa Lingkungan dan Biosistem Vol. 2 No. 2 (2024): Jurnal Relibi Vol.2 No.2 2024
Publisher : Universitas Ibn Khaldun Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32832/relibi.v2i2.1260

Abstract

Sustainable development is a key focus of Indonesia’s policy framework, as mandated by Law No. 32 of 2009 and Government Regulation No. 46 of 2016, which emphasize integrating Environmental Carrying Capacity and Load Capacity (CCLC) into development planning. This study identifies challenges in current CCLC assessments, including limited data accuracy and inconsistent methodologies. To address these issues, an innovative Environmental CCLC Determination System is proposed, integrating ecosystem services and advanced spatial modeling. The research methodology combines a comprehensive literature review and expert interviews to analyze existing practices and design the system. The proposed system incorporates decision support tools and spatial data analysis to provide a scientifically grounded, unbiased, and accessible framework for policymakers. Initial implementation will involve collaboration with academic experts, universities, and local governments, particularly in Bogor Regency and Bogor City. The system is expected to significantly enhance regional planning and environmental stewardship by the end of the 2025–2030 development period, aligning policies with sustainable development goals.
Physical, Chemical and Biological Analysis of Water Environment Quality in Tourism Area as a Basis for Sustainable Ecotourism Development in Bogor Zulaika, Aidha; Tri Hartono , Tjahjo; Saputra, Hery; Stephanie, Endah Nadiya
Jurnal Rekayasa Lingkungan dan Biosistem Vol. 3 No. 1 (2025): Jurnal Relibi Vol.3 No.1 2025
Publisher : Universitas Ibn Khaldun Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32832/relibi.v3i1.1711

Abstract

Lakes are an important part of the inland water system that functions to maintain environmental stability, support biodiversity, and provide ecosystem services such as clean water supply, flood control, and natural recreation space. This study was conducted to analyze the quality of the lake and the lake's carrying capacity for fisheries and tourism facilities. Physical, chemical, biological parameters, and lake fertility index were calculated referring to the Regulation of the Minister of Environment and Forestry of the Republic of Indonesia Number 5 of 2021 concerning Procedures for Issuing Technical Approvals and Operational Feasibility Letters for Environmental Pollution Control. The results of the study found high pollution parameters in BOD, COD, and TDS. Lake Lido is classified as having a fairly high pollution load with a lake with a Eutrophic trophic index so that further analysis is needed for the level of pollution distribution, lake carrying capacity and lake utilization management strategies for sustainable fisheries and tourism activities. Recommended strategy of Domestic Wastewater Treatment Plant is a system which meet the quality standards for domestic wastewater based on Permen LHK No. 68 of 2016, with an integrated system. As environmentally friendly fish farming strategy that is recommended was the use of SMART Floating Net Cages (KJA).
THE EFFECT OF CONTEXTUAL TEACHING AND LEARNING ON STUDENTS’ CONCEPTUAL UNDERSTANDING OF GEOMETRY Saputra, Hery; Maulina, Suci; Mirunnisa, Mirunnisa; Razi, Zulfa
Jurnal Sains Riset Vol 12, No 3 (2022): November 2022
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat (LPPM) Universitas Jabal Ghafur

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47647/jsr.v12i3.986

Abstract

Mathematics becomes more meaningful when it is relevant to real life and students are more engaged in mathematics learning when it relates to them. Contextual teaching and learning (CTL) is a teaching concept that connects knowledge to real-world situations. The present study aims to investigate the effect of CTL on students’ conceptual understanding of geometry. This experimental study employed a pre-test-post-test control group design. The samples are all eighth-grade students in Junior High School 4, Sakti Pidie, A census sampling technique was used in this study since all members of the population served as samples. The experimental class and the control class were randomly selected from the two available classes. The experimental class was taught geometry using CTL while the control class was taught conventionally. Data were collected from pre-test and post-test that were declared valid. Data analysis was performed using the Kolmogorov-Smirnov test for normality test, the Levene test for homogeneity test, and t-test for the hypothesis testing. The results revealed that students taught using CTL have better conceptual understanding of geometry compared to those who were taught conventionally. It implies that the implementation of contextual teaching and learning (CTL) on geometry learning is effective to promote students’ learning.Keywords: Contextual teaching and learning, conceptual understanding, geometry learning.   
APPLICATION OF THE GOAL PROGRAMMING METHOD AND SENSITIVITY ANALYSIS IN OPTIMIZING BREAD PRODUCTION PLANNING Zuhri; Sri Rafiqoh; Hery Saputra
INTERNATIONAL JOURNAL OF ECONOMIC LITERATURE Vol. 2 No. 4 (2024): April
Publisher : Adisam Publisher

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Abstract

Umama Bakery's bread production process is considered less than optimal because the production quantity for each flavor variant is unlimited, resulting in insufficient raw materials at certain times. In addition, the order production process requires a long total completion time (makespan), resulting in delays in production completion (mean tardines). The aim of this research is to optimize total completion time, average delay time, use of raw materials used and optimize production income. This research uses the Goal Programming model with the Branch and Bound method. The results of the analysis using the Goal Programming model with the Branch and Bound method obtained an optimal solution, namely excess total completion time (makespan) of 36 minutes, excess average delay time (mean tardines) of 6 minutes, excess raw materials in raw materials. material availability is all zero, and sales revenue shortfall is zero. The results of the sensitivity analysis show that bread production at the Umama Bakery factory will remain optimal if there are changes in the availability of production completion time, delays in production time, and the availability of raw materials during these changes. variables are still within tolerance limits.
Co-Authors Aidha Zulaika Anil Hakim Syofra Anil ASRIDAH WARNI TANJUNG Budi Susetyo Cut Italina Darmono Taniwiryono Dwikorawati, Syarifah Sofiah Hidayat, YS Hidayatulloh, Faisol Huda, Saihul Atho Alaul Irma Irma Ismail, Gunawan Maulina, Suci Mirunnisa, Mirunnisa Muhsin Nina Zakiah Ningrum, Almyanti Nurina Happy Rahma, Sukma Laksita Raisna Raisna Rimun Wibowo, Rimun Saripudin, Usep Sidik, Sahul Sri Rafiqoh Stephanie, Endah Nadiya Syamsiar, Syamsiar Taufiq Taufiq Tjahjo Tri Hartono Veta Lidya Delimah Pasaribu Zuhri Zulfa Razi