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Journal : JURNAL TEKNIK INDUSTRI

Optimasi Biaya dan Waktu Menggunakan Metode Duration Cost Trade-Off pada Proyek Pengecatan Crane Tadano GR-800EX Muhammad Hafidh Al Fathoni; Syarif Hidayat; Nunung Nurhasanah; Budi Aribowo
JURNAL TEKNIK INDUSTRI Vol. 13 No. 3 (2023): VOLUME 13 NO 3 NOVEMBER 2023
Publisher : Jurusan Teknik Industri, Fakultas Teknologi Indusri Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/jti.v13i3.19146

Abstract

Abstrak – Manajemen proyek adalah melaksanakan, mengorganisir, memimpin, mengendalikan sumber daya perusahaan untuk mencapai sasaran jangka pendek yang telah ditentukan. PT. Dian Pandu Pratama (DPP) merupakan perusahaan yang memberikan pelayanan untuk proses manufaktur alat berat dan jasa labour supply dibidang fabrikasi, assembling, painting, piping, fitter, dan lain-lain. PT. DPP mendapatkan proyek pengecatan alat berat mobile crane Tadano GR800-EX. Pada proyek ini, PT. DPP berusaha untuk menyelesaikan proyek dengan hasil yang baik, sesuai dengan estimasi pengiriman, dan penggunaan biaya yang efisien. Proses manajemen proyek yang dilakukan diawali dengan identifikasi lapangan, mengolah data, scheduling, dan membuat critical path method dalam proyek untuk mengetahui proses yang dapat dilakukan percepatan. Dalam proses pengerjaannya, ada beberapa kendala yang memperlambat proses pengerjaan. Untuk mempercepat proses pengerjaan, dalam penelitian ini diberikan 3 pilihan cara, yaitu penambahan jam kerja (lembur), penambahan tenaga kerja, dan penambahan mesin dan alat. Pada proyek ini, terdapat kendala yang membuat proyek tidak bisa berjalan selama 16 jam, sehingga diperlukan cara mempercepat waktu proses pengerjaan dengan mengoptimasi biaya yang ada. Pada penambahan jam kerja (lembur) 16 jam. Pada penambahan tenaga kerja dilakukan dengan menambah 2 tenaga kerja total waktu pengerjaan menjadi 72 jam. Pada penambahan alat dan mesin memiliki crash duration 24 jam. Setelah dilakukan kalkulasi perhitungan duration cost trade off, proses pengambilan keputusan dilakukan dengan menggunakan metode analytical hierarchy process dari beberapa respon terkait. Abstract - Project management is implementing, organizing, leading, controlling company resources to achieve predetermined short-term goals. PT. Dian Pandu Pratama (DPP) is a company that provides services for the manufacturing process of heavy equipment and labor supply services in the fields of fabrication, assembling, painting, piping, fitters, and others. PT. DPP won the Tadano GR800-EX heavy equipment painting project. In this project, PT. DPP strives to complete projects with good results, in accordance with delivery estimates, and efficient use of costs. The project management process that is carried out begins with field identification, data processing, scheduling, and creating a critical path method in the project to find out which processes can be accelerated. In the process, there are several obstacles that slow down the process. To speed up the work process, in this study 3 options were given, namely adding working hours (overtime), adding labor, and adding machines and tools. In this project, there were obstacles that prevented the project from running for 16 hours, so a way was needed to speed up the processing time by optimizing the existing costs. In addition to working hours (overtime) 16 hours. The addition of labor is carried out by adding 2 workers, the total processing time is 72 hours. The addition of tools and machines has a crash duration of 24 hours. After calculating the duration cost trade off, the decision making process is carried out using the analytical hierarchy process method from several related responses.
Inventory Planning in The Supply Chain Network of Sunflower Agro-Industry Nurhasanah, Nunung Nurhasanah; Putri, Hani Adinda; Noviyanti, Anissa; Riyana, Tharra Azzahra; Aribowo, Budi; Haryadi, Dody; Sudarwati, Wiwik
JURNAL TEKNIK INDUSTRI Vol. 15 No. 2 (2025): July 2025
Publisher : Jurusan Teknik Industri, Fakultas Teknologi Indusri Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/jti.v15i2.21842

Abstract

Sunflower agro-industry can potentially be a raw material for vegetable oil from seeds. In Indonesia, sunflower is a vegetable oil that is produced very limitedly. However, inventory planning is needed in the sunflower agro-industry's supply chain system to maximize this potential. At the same time, the sunflower agro-industry does not yet have a formal production and inventory planning system. Production activities are carried out based on the owner's intuition or orders received by the marketing department. The sunflower agro-industry supply chains consist of upstream, midstream, and downstream, but this research focused on the upstream and midstream segments. The upstream supply chain consists of sunflower seeds. Meanwhile, the midstream supply chain consists of sunflower cooking oil with 250 ml, 500 ml, and 1 liter packaging. This research aims to design the inventory planning by determining the economic order quantity using the single order quantity (SOQ) method, safety stock, number of orders, and reorder points. The results obtained in this study are the economic order, number of safety stock, number of orders, reorder points, and reorder points graph for sunflower agro-industry supply chains in 6 months. The upstream stage exhibits higher inventory requirements compared to the midstream. This may be caused by the need to buffer against higher variability in raw material availability. While the midstream inventory planning focuses on maintaining minimal safety stock due to predictable demand.
Co-Authors Adhipramana, Ivan Adlina, Ginang Natilla Afranissa Firdausiyah Ahmad Juang Pratama Ahmad Raafi Alfathsyah, Arrasyid Alhafizh Ramadhan Alif Fadillah Aliza Sabrina Ramadita Amalia, Nadia Rizky Aprilia Tri Purwandari Aprilia Tri Purwandari Aprilia, Aisyah Sabrina Assidqi, Nurul Imam Ayu Lestari Ningtiyas Belia Perwitasari Maharani Belia Perwitasari Maharani, Belia Perwitasari Bianda Mayfiani Tiartanaya Budi Tjahjono Chirzun, Ahmad Cut Shity Dautama Ryzza Putra Dede Ardi Rajab Denny Hermawan Dhia Puti Andini Wibowo Dicky Sumantri Dody Haryadi Dwi Astharini Fairuz, Salsa Frans Dory Gandana, Danny M Gerry Firmansyah Ghunyatullaami’ah Ghunyatullaami’ah Hafidz, Fahmi Hamid, Sofian Hanny Nurlatifah Hartanto, Nadiya Hasna Fakhirah Haryadi, Dody Hidayat Yorianta Sasaerila Hilda Yuliani Ilmi Ramanda Sitorus Ilsa Nuri Pabo Imam Wahyudi Indrawan, Imam Wahyudi Khoirunisa, Amanda Kian Aryadi Kushandayati Kushandayati Miftah Arifin Moza Aisyah Yasmin Mudrikah, Isna Ibnah Muh Asrul Irawan, Andi Muhammad Farhad Shoulthon Indrawan Muhammad Hafidh Al Fathoni Mujadin, Anwar Muthohar, Akhmad Nabila Ramadhany Barley Nadya Rinaldy Narandana, Rifqi Fauzan Natasari - Naufal, Muhammad Bintang Nita Noriko Noviyanti, Anissa Nunung Nurhasanah Nurhasanah, Nunung Nurhasanah Purwandari, Aprilia Tri Putri Yasmin Martsela Putri, Hani Adinda Raghdawulan Raghdawulan Raharjo, Fabian Trama Rakhmaputri, Septalia Reudinta Zesha Ridho Octavia Pernando Riyana, Tharra Azzahra Rizqi Maulida Amalia Rully Ardi Setyadi Rydhoni, Rydhoni Safira Tri Handayani Samijayani, Octarina Sarah Giovani Sopian Maulana Sukarman Sukarman Suryo Tondo Lukito Syafira Ihsani Syarif Hidayat Syarif Hidayat Syarif Hidayat Tharra Azzahra Riyana Tri Purwandari, Aprilia Tsabitah, Nimah Wajdi, Muhammad Raihan Widodo, Agung Mulyo Widya Astuti Wiwik Sudarwati Yadi Heryadi Yasmin, Moza Aisyah Yusuf, Andi Mukramin