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All Journal Bioma : Berkala Ilmiah Biologi BIOTROPIA - The Southeast Asian Journal of Tropical Biology Jurnal Sosial Ekonomi Pertanian Innofarm : Jurnal Inovasi Pertanian AGRIEKONOMIKA MAPETA Agridevina : Berkala Ilmiah Agribisnis Forum Agribisnis Habitat Buletin Penelitian Sosek Agrokreatif Jurnal Ilmiah Pengabdian kepada Masyarakat MIX : Jurnal Ilmiah Manajemen AGRIMOR UNEJ e-Proceeding Mimbar Agribisnis: Jurnal Pemikiran Masyarakat Ilmiah Berwawasan Agribisnis Jurnal AGROSAINS dan TEKNOLOGI Jurnal Ilmiah Universitas Batanghari Jambi Jurnal Penelitian Pendidikan IPA (JPPIPA) Jurnal Pertanian Agros Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) JURNAL ILMIAH MAHASISWA AGROINFO GALUH Agrilan : Jurnal Agribisnis Kepulauan Jurnal Ilmiah RESPATI JIA (Jurnal Ilmiah Agribisnis) : Jurnal Agribisnis dan Ilmu Sosial Ekonomi Pertanian International Journal of Economics, Business and Accounting Research (IJEBAR) Jurnal Agroplasma Agriecobis : Journal of Agricultural Socioeconomics and Business ZIRAA'AH MAJALAH ILMIAH PERTANIAN JAS (Jurnal Agri Sains) Jurnal Agribisnis Journal of Management - Small and Medium Enterprises (SME's) Nusantara Science and Technology Proceedings Agrokompleks International Journal of Economy, Education and Entrepreneurship (IJE3) KARYA: Jurnal Pengabdian Kepada Masyarakat AJARCDE (Asian Journal of Applied Research for Community Development and Empowerment) International Journal of Multidisciplinary Research and Literature (IJOMRAL) Jurnal Ilmiah SOSIO AGRIBIS AGRI-TEK : Jurnal Penelitian Ilmu-ilmu Eksakta Journal of Indonesian Rural and Regional Government (JIRReG) JURNAL HUTAN TROPIS Barakuda 45 Analisa: Journal of Social Science and Religion Jurnal Ilmiah Membangun Desa dan Pertanian Indonesian Research Journal on Education Jurnal AGRISEP: Kajian Masalah Sosial Ekonomi Pertanian dan Agribisnis SOSIO KONSEPSIA: JURNAL PENELITIAN DAN PENGEMBANGAN KESEJAHTERAAN SOSIAL Life and Death: Journal of Eschatology Policy Brief Pertanian, Kelautan, dan Biosains Tropika BIODIVERS - BIOTROP Scientific Magazine Jurnal Agribest Jurnal Ilmiah Manajemen Agribisnis
Sri Widayanti
Universitas Pembangunan Nasional “Veteran” Jawa Timur
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Journal : Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering)

 1 
Analysis of Raw Material Inventory Control in Robusta Ground Coffee Production Maharani, Adinda Dwi Ulfah; Winarno, Sri Tjondro; Widayanti, Sri
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol. 14 No. 4 (2025): August 2025
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtepl.v14i4.1212-1221

Abstract

This study aims to analyze raw material inventory control using the Material Requirements Planning method as raw material inventory control and to forecast inventory in 2024. The data analysis method is qualitative quantitative descriptive analysis. This analysis was carried out at CV Kopi Citarasa Persada. Efficiency data processing uses Minitab 21 and Excel. The problem in this study is related to frequent running out of raw materials due to late ordering by the company. The results of the study show that the availability of raw materials for coffee beans, packaging and stickers has a Lead Time of 4 days with the application of the Lot Sizing method, Part Period Balancing technique and the Wagner Within Algorithm which are the most efficient in obtaining minimum ordering costs in this study. Robusta ground coffee demand data for a year in 2023 produces forecast data for January and February 2024 by comparing the Moving Average and Single Exponential Smoothing techniques. The comparison results show that the Moving Average technique is suitable for forecasting raw material inventory because it has a smaller MAD value, the smaller the forecast value obtained, the more accurate it is in determining the size of the data as it was originally.   Keywords: Forecasting, Lot Sizing, Material Requirements Planning.
Impact of Rice Price Fluctuations on the Welfare of Paddy Farmers Fadilah, Rizka Putri; Widayanti, Sri; Hendrarini, Hamidah
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol. 14 No. 4 (2025): August 2025
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtepl.v14i4.1369-1381

Abstract

Rice is a staple food for Indonesia and should be available at an affordable price. This study aims to analyze the factors causing fluctuations in rice prices, and analyze the effect of changing prices on the livelihoods of rice farmers. The farmers’ welfare was calculated using Farmer Exchange Rate (FER). The analysis was conducted using a simultaneous equation model, utilizing time series data from 2009 to 2023. This study employed Two-Stage Least Squares (2SLS) and Multiple Linear Regression techniques. The findings reveal that rice production is significantly influenced by the previous year’s rice prices and the size of the harvested area. Meanwhile, the factors affecting consumption are the rice price variable and income levels, as well as the factors influencing rice prices, which include the price of unmilled dry grain, rice production, and the highest retail price. Meanwhile, regarding the welfare of rice farmers measured by the FER, it is known that the FER in East Java has fluctuated from 2009 to 2023. The highest contributor to the rice FER occurred in 2023, reaching 115.64%, with an average FER for East Java from 2009 to 2023 of 102.86%. This indicates that the Rice FER is in a surplus state, suggesting that rice farmers are prosperous.
Analysis of Procurement and Supply Chain Control of Sugarcane in a Sugar Mill Renata, Erika Aprilia; Soedarto, Teguh; Widayanti, Sri
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol. 14 No. 5 (2025): October 2025
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtepl.v14i5.1935-1947

Abstract

Sugarcane raw material stocks in sugar factories need to be maintained at an optimal level to avoid either shortage or excess situations that ensuring smooth production. This study aims to analyze the procurement mechanism and inventory control of sugarcane raw materials, analyze the trend of sugarcane raw material procurement, and to analyze the inventory control of sugarcane raw materials. Research was conducted at PT PG Candi Baru Sidoarjo. Data was analyzed using descriptive analysis, trend analysis, and Economic Order Quantity (EOQ) analysis. Results of this study showed the procurement mechanism and inventory control of sugarcane raw materials by PT PG Candi Baru. The trend of sugarcane raw materials had decreased every period caused by several factors. The number of economical sugarcane orders in the last year 2023 was 1,491,545,174 tons. The amount of safety stock that must be owned by PT PG Candi Baru Sidoarjo was 234,044.8 tons. The number of reorder (Reorder Point) was 505,761 tons. The optimal total cost of sugarcane raw material inventory was IDR 20,885,934,920.14, while the company policy was IDR 20,998,060,000. It can be concluded that the EOQ method obtained more efficient results with a financial difference value of IDR 112,125,079.86.
Co-Authors . Supriyanto A, Trijanti A. Widinni Abroor, Muhammad Rifqi Amelia, Nofa Putri Amir, Indra Tjahaja Anggraeni, Iis Anggraeni, Nimas Rizki Tri Anggun Dewayani Aprilia Dwi Permata Sari Arika Mardiana Aslam, Saufan Awwala, Syaqila Husna Ayu Astari, Risya Bait, Misbakhul Barep Prastyo Bayuaji, David Yudhoyono Bigcas, Evelyn V. Dawami, Muhammad Farhan Defita Sari Dewantara Eris, Deden DEWI RAHMAWATI Dewi, Amelia Cantrika Dita Atasa dolyto f Dona Wahyuning Laily Dwi Indah Febriyani Dya Maretya Kresna Efendy, Iwan Kurniawan Ekandini, Syafira Andrastea Eko Nurhadi Endang Yektiningsih, Endang Eris, Deden Dewantara Fabiyola, Rizcha Oktanza Fadilah, Rizka Putri Fitra, Allegra Aura Fitri, Saidatul Fitriana, Nisa Fitriana, Nisa Hafiidhoh Hakim, Burhanul Halimah, Azki Nur Hamidah Hendrarini Harya, Gyska Indah Hery Toiba Hidayatullah, Noval Tauhid Husein, Sabarina I Made Sutajaya Ida Syamsu Roidah, Ida Syamsu Ika Sari Tondang Imran, Dr. Zulhamsyah Indah Harya, Gyska Indah, Pawana Nur Indah, Pawana Nur Indah, Pawana Nur Indra Tjahaja Amir Indra Tjahaja Amir Indra Tjahaja Amir Ines Paramithasari Jasmine, Sofia Latifah Kusuma, Inas Mufidati Kusuma, Mani’atul Fitan Lailly, Dona Wahyuning Laily, Dona Wahyuning Lestari, Renita Dwi Maharani, Adinda Dwi Ulfah Marchelina, Shelvia Maulida Ummah, Rifana Rizki Mazzlin, Novia Ely Meilina, Mutiara Putri Milanda Nisful Laili Mirza Andrian Syah Mubarokah Mubarokah Mubarokah Mufida R.F, Indah Alvin MUHAMMAD ROHMAN TIOVANDI Mukhlis Ni Putu Sri Ratna Dewi Noor Rizkiyah Nugroho, Sigit Dwi Nur Indah, Pawana Nur, Firyal Saifana Nurhadi, Eko Nuriah Yuliati P. Perdinan Pawana Nur Indah Pawana Nur Indah Prasmita Dian Wijayanti Prasmita Dian Wijayati Pratama, Caesariano Afrilio Pratiwi, Iramandha Putri Purnajaya, Agus Puspita, Salsabila Ika Putri, Alief Ramadhani Novita Cahyono Putri, Icha Alifia Yokendy Putri, Inas Adilah RADIYANTO, INDRIYA Rahman, Mochamad Fatkhur Ramdan Hidayat Ratnasari, Septilia Renata, Erika Aprilia Rendikasari Febriana Putri resia, uul Rhomi Ardiansyah Rizki Ivah Lutfiah Rochyana, Yunita ROSITA, Risa Sadhina, Risma Safira, Vivin Sandrina, Linda Saragih, Febrina Lestari Septiyana, Eka Elsha Septya, Fanny Setiawan, Risqi Firdaus Setyaningtyas, Megawati Mahardika Rizky Shalsabillah Nur Fitria SIGIT DWI NUGROHO Simanjuntak, Gabriela Marie Curie Soedarto, Teguh Soniya, Intan Garaniva Sri Tjondro Winarno, Sri Tjondro Sudiyarto Sudiyarto sudiyarto, Sudiyarto Sudiyarto, Sudiyarto Sugiarto, Slamet Widodo SUGIYANTO Surono, Anggun Kurniawati Susilo , Erwan Syah, Mirza Andrian Syahfitri, Dwi syarif imam Syarif Imam Hidayat Tondang, Ika Sari Ummah, Rifana Rizki Maulida usuma Dewa, Arya Wardhana K Vivi Irawati Wachju Subchan Wahyu Santoso Wandira, Galuh Ayu Wasista, Yudha Eka Widiastuti, Herni Widinni, Trijanti A. Yahya, Azriel Yogananta, Refo Zhafira Puspa Ningrum Zulfarida Solihiyah, Erni Dwi Zulhamsyah Imran