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All Journal ASEAN Journal of Systems Engineering Nyimak: Journal of Communication Jurnal Manajemen dan Teknologi Rekayasa Journal Industrial Engineering and Management (JUST-ME) Metris: Jurnal Sains dan Teknologi Efficient: Indonesian Journal of Development Economics
Dinda Safitri Ramadhani
Universitas Muhammadiyah Surakarta
Humanities Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Mechanical Engineering Social Sciences

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MODEL OF VEHICLE ROUTING PROBLEM WITH SPLIT DELIVERY, MULTI TRIPS, MULTI PRODUCTS AND COMPARTMENTS FOR DETERMINING FUEL DISTRIBUTION ROUTES Dinda Safitri Ramadhani; Nur Aini Masruroh; Joko Waluyo
ASEAN Journal of Systems Engineering Vol 5, No 2 (2021): ASEAN Journal of Systems Engineering
Publisher : Master in Systems Engineering

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The industrial development in Indonesia encourages companies to have high sensitivity in competing to meet consumer demands promptly by considering minimum distribution costs. One of the factors that can affect distribution costs is route determination. Determining the distribution route is the Vehicle Routing Problem (VRP). The purpose of VRP is to arrange the order of distribution routes to produce a minimum total distance. This study aims to determine the fuel distribution route at TBBM Rewulu in one delivery period to obtain the optimal distribution route and minimize the vehicle mileage. Delivery is carried out using three types of tanker trucks with heterogeneous capacities. This study uses a mathematical model of Mixed Integer Linear Programming (MILP) by considering split delivery, multi trips, multi-products, and compartments.The branch and bound method in the LINGO solver has been used to solve this problem. This model was tested on a simple case using data of 8 customers with different distances and demand shipped by truck. The results obtained indicate that no boundaries are violated, and all consumers are served. The mathematical model built is still general, so it can solve similar cases. A model can be developed for further research by adding VRP variants such as time windows and adding the product types to represent the entire existing system.
Multicultural CSR Communication for Achieving a Sustainable Environment Apriliani, Riski; Cassana, Rona Rizkhy Bunga; Ummah, Khanun Roisatul; Ramadhani, Dinda Safitri; Alhasanain, Nando
Nyimak: Journal of Communication Vol 8, No 2 (2024): Nyimak: Journal of Communication
Publisher : Faculty of Social and Political Science, Universitas Muhammadiyah Tangerang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31000/nyimak.v8i2.10838

Abstract

Corporate Social Responsibility (CSR) plays a vital role in fostering an empowered and sustainable society, particularly concerning environmental conservation efforts. This study explores the implementation of CSR communication through a multicultural lens by PT Kilang Pertamina Internasional Refinery Unit II Sungai Pakning, focusing on its "Permata Hijau Pesisir Gambut" program aimed at preserving the environment and protecting coastal areas. Employing a qualitative descriptive method, data were gathered through in-depth interviews, literature reviews, and document analysis. The Miles and Huberman data analysis model was utilized, which encompasses data collection, presentation, and simultaneous conclusion drawing, supported by source triangulation to ensure data validity. The findings indicate that PT Kilang Pertamina Internasional Refinery Unit II effectively adopts the triple bottom line approach of "planet, people, and profit" to attain sustainable development. By integrating multicultural principles, the CSR program aligns with community needs and cultural contexts along the peatland coast. A symmetrical CSR communication model was implemented, incorporating socialization, training, and direct assistance in collaboration with local groups, such as the Harapan Bersama Group, to establish the Mangrove Education Center Ecotourism. This approach exemplifies the effectiveness of culturally adaptive CSR strategies in promoting environmental sustainability.Keywords: CSR Communication, Multicultural, Sustainable Environment, Pertamina AbstrakTanggung jawab sosial perusahaan (CSR) memainkan peran penting dalam membangun masyarakat yang berdaya dan berkelanjutan, terutama dalam upaya konservasi lingkungan. Penelitian ini mengeksplorasi pelaksanaan komunikasi CSR melalui pendekatan multikultural oleh PT Kilang Pertamina Internasional Refinery Unit II Sungai Pakning, dengan fokus pada program "Permata Hijau Pesisir Gambut" yang bertujuan untuk melestarikan lingkungan dan melindungi daerah pesisir. Menggunakan metode deskriptif kualitatif, data dikumpulkan melalui wawancara mendalam, tinjauan pustaka, dan analisis dokumen. Model analisis data Miles dan Huberman digunakan, yang mencakup pengumpulan data, presentasi, dan penarikan kesimpulan secara bersamaan, didukung oleh triangulasi sumber untuk memastikan validitas data. Temuan menunjukkan bahwa PT Kilang Pertamina Internasional Refinery Unit II berhasil mengadopsi pendekatan triple bottom line "planet, people, dan profit" untuk mencapai pembangunan berkelanjutan. Dengan mengintegrasikan prinsip-prinsip multikultural, program CSR ini selaras dengan kebutuhan komunitas dan konteks budaya di sepanjang pesisir lahan gambut. Model komunikasi CSR yang simetris diterapkan, mencakup sosialisasi, pelatihan, dan bantuan langsung bekerja sama dengan kelompok lokal, seperti Harapan Bersama Group, untuk mendirikan Ecotourism Pusat Pendidikan Mangrove. Pendekatan ini menunjukkan efektivitas strategi CSR yang adaptif secara budaya dalam mempromosikan keberlanjutan lingkungan.Kata Kunci: Komunikasi CSR, Lingkungan Berkelanjutan, Pertamina
Listening to Student Voices: Aspect-Based Sentiment Analysis of Academic Services Using BERT Setiawan, Purwo; Sakti, Arga Seta Asmara; Ramadhani, Dinda Safitri
JUMANTARA: Jurnal Manajemen dan Teknologi Rekayasa Vol 4, No 2 (2025): Juli
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28989/jumantara.v4i2.3043

Abstract

The inability to systematically process large volumes of unstructured student feedback hinders the enhancement of academic service quality in higher education. To address this challenge, this study develops an Aspect-Based Sentiment Analysis (ABSA) model using a fine-tuned BERT architecture. applied to 1,110 student reviews at Universitas Muhammadiyah Surakarta. The model was trained and evaluated using a dataset of 1,110 student reviews, filtered from an initial dataset of over 40,000 raw data points. To assess its performance, standard metrics such as accuracy, precision, recall, and F1-score were employed. The model demonstrated high performance, achieving an overall accuracy of 98.6% and an F1-score of 0.92 for identifying service aspect terms. The analysis successfully extracted key aspects, including staff interaction, administrative processes, and service efficiency. Critically, it revealed that staff interaction was the aspect with the most significant negative sentiment, providing a clear target for institutional improvement. This research confirms that the BERT-based ABSA model is a reliable and scalable tool for transforming qualitative student feedback into actionable, data-driven insights, enabling targeted enhancements to academic service quality.
Analisis Pengendalian Kualitas Produksi Gula dengan Pendekatan Six Sigma pada PT. Sinergi Gula Nusantara Ramadhani, Dinda Safitri; Ifalda, Bernika Deane
JUMANTARA: Jurnal Manajemen dan Teknologi Rekayasa Vol 4, No 1 (2025): Januari
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28989/jumantara.v4i1.2832

Abstract

PT Sinergi Gula Nusantara merupakan perusahaan penghasil gula berkualitas tinggi yang masih menghadapi kendala berupa adanya produk gula yang cacat dalam proses produksinya. Hal ini berdampak pada kualitas produk, reputasi perusahaan, dan kepuasan pelanggan. Penelitian ini bertujuan untuk mengidentifikasi dan menganalisis faktor penyebab kecacatan produk karena proses produksi. Penelitian dilakukan menggunakan metode six sigma dengan pendekatan DMAIC (Define, Measure, Analyze, Improve, Control). Hasil penelitian menunjukkan bahwa nilai Defect Per Million Opportunity (DPMO) sebesar 4839,96 dengan level sigma 3,75 yang termasuk kategori rata-rata industri Indonesia. Usulan perbaikan meliputi pelatihan operator untuk menyamakan kompetensi, penerapan standar operasional prosedur (SOP) secara konsisten, pemberian teguran bagi operator yang tidak fokus, pembagian jam kerja yang optimal, serta pemberian waktu istirahat yang cukup untuk mengurangi kelelahan dan risiko kecelakaan kerja. Implementasi ini diharapkan dapat meningkatkan efisiensi produksi, mengurangi kecacatan produk, serta memperbaiki kualitas dan keamanan proses kerja.
EVALUASI RISIKO KECELAKAAN KERJA PADA WATER TREATMENT PLANT MENGGUNAKAN METODE BOWTIE Dinda Safitri Ramadhani; Pambudi, Ridho; Antesty, Sella; Putro Satriyono, Raden Danang Aryo
Journal Industrial Engineering and Management (JUST-ME) Vol. 6 No. 01 (2025): Journal Industrial Engineering and Management (JUST-ME)
Publisher : Program Studi Teknik Industri Fakultas Teknik Universitas Islam Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47398/just-me.v6i01.111

Abstract

Pusat Pengembangan Sumber Daya Manusia Minyak dan Gas Bumi (PPSDM MIGAS) merupakan instansi pemerintah dibawah naungan Kementrian Energi dan Sumber Daya Mineral. Dalam kegiatan operasionalnya, khususnya di Water Treatment Plant (WTP), aspek Keselamatan dan Kesehatan Kerja (K3) menjadi prioritas utama. Setiap stasiun kerja seperti pompa submersible, bak YAP, bak gravitasi, bak filter, bak CPI, dan bak industri memiliki potensi bahaya yang perlu diidentifikasi dan dikendalikan. Penelitian ini bertujuan untuk mengidentifikasi potensi bahaya, menganalisis tingkat risiko menggunakan metode Bowtie, serta memberikan rekomendasi perbaikan. Analisis dilakukan melalui observasi, kuesioner, dan perhitungan Importance Index (IMPI). Hasil penelitian menunjukkan tiga potensi bahaya tertinggi yaitu area bak yang tidak memiliki pagar dengan nilai IMPI 75%, area bak tidak steril dengan nilai IMPI 78% dan area bak berlumut dengan nilai IMPI 69% yang dikategorikan sebagai risiko tinggi. Penelitian ini memberikan usulan tindakan pencegahan untuk mengurangi dampak risiko terhadap keselamatan operator, sekaligus menjadi acuan peningkatan K3 di lingkungan PPSDM MIGAS.
Analysis of Mental Workload on Counter Sales Using NASA-TLX Method Safitri Ramadhani, Dinda; Soraya Putri, Arinda; Ambarwati, Niken Fauziah
Metris: Jurnal Sains dan Teknologi Vol. 24 No. 01 (2023): Juni
Publisher : Prodi Teknik Industri, Fakultas Teknik - Universitas Katolik Indonesia Atma Jaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25170/metris.v24i01.4358

Abstract

PT. XYZ is a service-oriented branch company that provides consumers with a wide range of products. Services provided by this company is divided into three main sections, namely sales, service, and spare part. One of the main parts is sales, which is selling units of cars carried out by counter sales to meet targets. The demand for achieving targets provides a psychological workload for counter sales. Therefore, it is necessary to measure the mental workload in this area. The work measurement method used in this research is NASA-TLX. This method was developed based on the emergence of subjective measurement needs in measuring workload using six indicators, namely mental demand, physical demand, temporal demand, own performance, effort, and level of frustration. The results showed that WWL values ​​were in the range of 88.33-91.67 and had a very high category. Several recommendations for improvement that need to be implemented include evaluating picket scheduling by considering predictions of increased customer visits, conducting routine training and providing motivation, and providing rewards as a form of appreciation for workers according to their achievements.
Identification of Factors Driving Household Intention to Implement Circular Economy Raden Danang Aryo Putro Satriyono; Dinda Safitri Ramadhani
Efficient: Indonesian Journal of Development Economics Vol. 6 No. 3 (2023)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/8hbjxa39

Abstract

Indonesia’s waste problem leads to severe effect such as economic, environment and social consequences in Indonesia as second largest contributor of plastic waste in the world. Most of the plastic waste source in Indonesia is from household sector. This phenomenon then can be further analysed with variables related to perception and behavior of humans. This study investigates determinants of residents' participation intention and behavior to implement circular economy for their plastic waste in a framework that incorporates Extended theory of planned behavior (TPB). Structural Equation Modeling (SEM) then was used to analyse all the variables correlation, The results of this study are that there are 5 significant correlations between variables, namely Descriptive Norm and Attitude have a significant and negative effect on Intention to Use. This study also found that the factors Perceived Behavioral Control, Individual concern and perceived economic use had a positive and significant effect. In addition, other findings are that Perceived Usefulness and Perceived Effectiveness and perceived environmental knowledge do not have a significant effect on Intention to Use.
Co-Authors Alhasanain, Nando Ambarwati, Niken Fauziah Antesty, Sella Cassana, Rona Rizkhy Bunga Ifalda, Bernika Deane Joko Waluyo Khanun Roisatul Ummah Nur Aini Masruroh Pambudi, Ridho Raden Danang Aryo Putro Satriyono Riski Apriliani Sakti, Arga Seta Asmara Setiawan, Purwo Soraya Putri, Arinda