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Journal : Science and Technology Indonesia

Inventory Model for Deteriorating Pharmaceutical Items with Linear Demand Rate Indrawati; Puspita, Fitri Maya; Supadi, Siti Suzlin; Yuliza, Evi; Rizki, Krisda
Science and Technology Indonesia Vol. 9 No. 1 (2024): January
Publisher : Research Center of Inorganic Materials and Coordination Complexes, FMIPA Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26554/sti.2024.9.1.148-155

Abstract

Good management of goods is needed so that the inventory activities of a business can run smoothly as the part of supply chain management which aims to monitor the flow of stock of goods from the purchasing process, and storage to the point of sale. In terms of inventory or supplies of pharmaceutical goods, conditions such as shortages or stockouts must also be considered which are a matter of control, management, and security. In this study, an inventory model is formulated with deterioration or damage to pharmaceutical goods that occurs due to the length of time when the goods are stored with a linear demand level. In the optimal solution, the inventory time occurs when it reaches the zero point (t1) of 0.34 and the cycle length (T1) of 0.83 with an average minimum total cost (TC) of $445.25 per cycle which is completed by WolframAlpha software. Sensitivity analysis changes the value results in the value of (TC) which that increases for all parameters. In increasing the linear function variables (a and b), it produces t1 and T1 stable values. An increase in the cost of each item damage (DC) and constant damage rate (theta) produces a t1 stable value, but the value of T1 increases. The increase in storage costs (h) results in a decrease in the value of t1 and T1. An increase in the cost of shortages (s) results in an increase in the value of t1 and a decrease in the value of T1.
Model of Improved Set Covering Location Problem in Determining The LRT Musi Emas Feeder Stops: Route LRT DJKA Station - Plaju Terminal Octarina, Sisca; Puspita, Fitri Maya; Yuliza, Evi; Indrawati; Tasiah, Mawar
Science and Technology Indonesia Vol. 10 No. 2 (2025): April
Publisher : Research Center of Inorganic Materials and Coordination Complexes, FMIPA Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26554/sti.2025.10.2.320-335

Abstract

This study aims to determine the optimal location of the LRT Musi Emas Feeder stops Corridor 5 in conjunction with the LRT DJKA Station-Plaju Terminal route. Light Rail Transit (LRT) is a rapid transit system that employs an integrated rail crossing model. At present, the LRT remains a primary mode of daily transportation for the residents of Palembang. One of the initiatives undertaken by the government to facilitate the utilization of LRT transportation is the provision of passenger transportation (feeder services). The positioning of the feeder stops remains suboptimal and needs more integration with existing public facilities. The distance between the stop locations is highly variable, with some nearby and others at considerable distances. This issue is addressed through the formulation of the Set Covering Problem (SCP) model, which encompasses the Set Covering Location Problem (SCLP) and Maximal Covering Location Problem (MCLP) models, as well as the development of the Improved SCLP model. The SCP model yields four optimal stop locations, which are significantly distant from the actual conditions at the site. In contrast, the Improved SCLP model identifies 48 optimal feeder stops mapped using Geographic Information System (GIS) software. This map of feeder stops could inform the Palembang City Transportation Agency’s efforts to develop an integrated transportation management system.
Co-Authors Abdul Fatah Arif Hidayat ABDUL HAMID Ade Irawan Agus lukowi Agus Lukowi Agustina, Kesiya Ahmad Harun Yahya Alim Nur Khafidh Almazroei, Essa Eqal Amilia Hikma Al-Umari Amri Anang Walian Ananta, Ahmad Rizal Roby Andrew Nobiantoro Gunawan Anindi Putri Harjanti Anita Candra Dewi ANNISA NABILA Ardina, Mona Aris Singgih Budiarso Arsal, St Fatmah Asmat, Samad Astika, Ferni Ayu Wulandari Azizah, Nabilah Nur Bening Rahimi Titisari Bhustomi, Abd Yazid Bonse Aris Mandala Putra Simangunsong Brigitta Natasya Halim Cindy Meliyana Sari Cinta Sembiring Cucu Atikah Darmariani, Martiana Kusuma Dede Kurniawan Desta Wahyuni Devi Nuryanto DEWI ANGGRIANI HARAHAP Dian Cahyawati Didi Suryadi Didik Setyo Heriyanto Diyaz Rachmaningtyas Dwi Noviani Dwi Wahyuni Eka Susanti Eka susanti Elisa Nurnawati Endro Setyo Cahyono Endro Setyo Cahyono, Endro Setyo Eqlima Elfira Evana Gina Shantika Evi Yuliza, Evi Fabiola Bulimasena Luturmas fadilla, zianfadilla Faizzah, Umi Nur Febriyanti, Iin Ferani Eva Zulvia Ferronika, Paranita Fitra Nur Azizah Fitri Damayanti Fitri Maya Pupita Fitri Maya Puspita Fitria Widyawati Guntur Syahputra, Guntur Gusman Virgo Haerianti, Masyita Halfiziya, Heleni Harahap, Sholihuddin Hari Abdus Salam Hari Toha Hidayat Hasmalia Heldawati Heleni Halfiziya Hidayat, Ahid Humaidi Inosenisus Nadeak Inosensius Nadeak Irmeilyana Isnawan, Muhamad Galang Jamili Jawasi Jenni Pannaco Jufrizal junaedi, yunding Juniarti Rara'Matande Juniwati Juniwati Khoiriyah Kurnianti, Nur Aziza La Ode Santiaji Bande Lanny Ramli, Lanny Lestari, Putu Eka Pethiwi Lia, Rakhel Lina Choridah Lina Susilowati M. Zarkasyi Mahdi Martin Uribe Masagus Achmad Fahrel Maulita Megawati Meiza Putri Lestari Melawati, Ayu Mintawati, Hesri Mirza Denia Putri Muhaimin Hamzah MUHAJIR Muhammad Riska Muhsin MUSLIMIN MUTHMAINNAH Najarudin Nanang Suwandi Nasaruddin Nasirun Nasirun, M. nasirun, muhammad Nia Aprilla Nila Kusumawati Nina Kurniah, Nina Ning Eliyati Ninis Nugraheni Novi Rustiana Dewi Nur Ahmad, Nur Nur Fadilah NURAFNI, ALDA NUR Oki Dwipurwani Oky Sanjaya Panjaitan, Dertaida Pundawa Sari, Noti Putra Bahtera Jaya Bangun, Putra Bahtera Jaya Putri, Fia Alifah Putu Arimbawa, Putu Radian Salman Rahayu Tamy Agustin Rahmadani, Annisa Rahmadani, Mahdalena Rahmat Rakhel Lia Resi Aulia Revaldo Dewa Fransisko Rian, Muh. Ridha Hidayat Rina Febrina, Rina RISKA WULANDARI Risnah Rita Cempaka Rizki, Krisda Robinson Sitepu Rr. Herini Siti Aisyah Rudia, La Ode Adi Parman Rusdi Rusmayadi, Muh Ryan Feraldy Haroen Ryan Wahyudi Safrila, Annisa Samsuriadi Sang Ayu Made R Sarwati Sarwati, Sarwati Selvi Yani Setiawati , Eka Siang Br Tarigan Sinta Rosiani Siregar, Ahmad Farhan Sisca Octarina Siti Tohira Soep Soetarno Sri Ambardini Sri Astuti Sri Erlita Sri Erlita Sri Hardianti Stephen Martin Sudiarti, Putri Eka Supadi, Siti Suzlin Supardi, Sudarman Suprapti , Anni Suprapti, Anni Suriana Sutarto Sutarto Tasiah, Mawar Taufiqurrahman, Safikri Tia Amelia Tira tarianti Tri Deliya Agustin ulfa, mariaulfa Verry Ginoga Vincent Laiman Vincent Lau Virga Inesrawanti Virnanda Laraswati Wardaya, Laksamana Yudya Warit Aziz Watono Wawan Muliawan Weka Gusmiarty Abdullah, Weka Gusmiarty Wicaksono, Iwan Widyatama, Denta Putra Wisnu Akbar Prabowo Yasrib Putranto Saban Yeni Nuraeni Yenny Safitri Yolastasya Br Sembiring Zahratul Qalbi Zaida, Sismy Zein, Reza Maulana Zita, Alena