e-Jurnal ITATS (Institut Teknologi Adhi Tama Surabay)
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Service Supply Chain Risk Analysis and Control of Port Based on the using HOR Approach
Full text linkPorts have an important role in the maritime transportation system but also face various obstacles and threats to different types of risks. Economic conditions and activities that tend to be complex and uncertain such as the threat of the COVID-19 pandemic, climate change, and geopolitics cause port development and operations to face various challenges and uncertainties. The ASDP port of the Juata Tarakan ferry has become one of the important parts of community activities to travel from Tarakan island to the surrounding islands such as Tana Tidung and Nunukan. Various studies have been conducted to learn about the operational phases of ports, but not about the overall life cycle. In addition to operational factors, there are environmental factors that still need to be explored in order to avoid failure to distinguish the causes and consequences of risks from risk events. In this study, the process of identification, analysis, and risk mitigation is carried out using a house of risk approach to be able to identify risk events and risk causative agents. This study seeks to explore the risk that is a key component by looking for the relationship between one risk agent and another risk agent and its impact on port companies. Risk prevention actions are discussed in this study in order to be an insight to rethink port risks and design strategic management. The purpose of this study is to help port authorities, especially ASDP ferry, to develop an understanding and management approach to risk from all aspects of the life cycle of the por
Advertising Strategy in Oligopoly Market Competition using Game Theory Approach
Full text linkIn oligopoly markets characterized by homogeneous products, producer competition engenders intense rivalry. To prevail over the market, producers employ diverse strategies to boost sales of their respective products, with advertising being a prominent tactic. This strategy aims to augment market awareness of their offerings. This study aims to examine the competitive conduct of producers in oligopoly markets through the lens of game theory. The decision-making scheme under consideration is based on Stackelberg, wherein the leader determines the initial strategy, which the follower then matches. The results of this study indicate that large companies exhibit greater resilience in maintaining their market share compared to small companies. Predatory advertising strategies are found to be effective for companies with large market shares in keeping market dominance. However, for companies with smaller market shares, the adoption of cooperative advertising strategies is recommended to enhance product image without the risk of excessive advertising expenditure
Determination of Technical Specifications for a Digital QR Code System Using Axiomatic House of Quality for Error Prevention
Full text linkThis study aims to determine the technical specifications of a digital QR Code system for the weighing process of practical spice powder recipes using Axiomatic House of Quality to prevent human error. User requirements data were collected from 25 respondents and validated through a Focus Group Discussion (FGD) involving 9 technical experts. The results identified 14 Customer Attributes (CA), which were subsequently translated into 14 Design Parameters (DP). Design matrix analysis indicated that the system is categorized as an uncoupled design, where each Functional Requirement corresponds to a specific DP, thus maintaining the independence of functions and design parameters. The resulting technical specifications are practical and applicable, covering hardware components, user interface, alarms, data storage systems, and material detection mechanisms. Therefore, the designed digital QR Code system can prevent weighing errors caused by human error and enhance product quality from the consumer’s perspectiv
Optimizing the Number of Internal Trucks Based on Berth Allocation and Quay Crane Assignment at a Container Terminal
Full text linkThe increase in international trade and production automation has led to a global container traffic surge at ports, including Terminal Peti Kemas X, one of Surabaya's main domestic terminals. This situation requires more effective and efficient management of handling equipment, particularly internal trucks that link the dock and the stacking yard, to avoid congestion and operational delays. However, the loading and unloading performance and vessel service at this terminal are not optimal due to fluctuating container flows and suboptimal equipment allocation, particularly for quay cranes (QC) and internal trucks (IT). This study aims to optimize the number of internal trucks based on quay allocation and quay crane assignment tailored to the volume of containers being loaded and unloaded, using discrete event simulation as the primary approach. Performance is measured using two leading indicators: box/crane/hours (BCH) and vessel turnaround time (TRT). Under existing conditions, the BCH and TRT values are 23.43 boxes and 15.24 hours, respectively. Several improvement scenarios were developed by varying the number or ratio of quay crane and internal truck assignments, without adding new equipment. The scenario analysis found that the best scenario has a container volume configuration of 150 boxes with 2 QC and 7 IT assignments, while a container volume of 150 boxes has 2 QC and 11 IT assignments. This configuration can increase BCH to 25.33 boxes and reduce TRT to 11.82 hours. These findings indicate that this approach is practical in significantly improving system performance
Analysis of Lean Manufacturing and Agile Manufacturing Implementation to Reduce Waste and Improve Productivity in Crankshaft Repair Production (Case Study: PT. Intidaya Dinamika Sejati – Jember)
Full text linkThis study aims to analyze the implementation of Lean Manufacturing and Agile Manufacturing in reducing waste and increasing productivity in the crankshaft repair production process at PT. Intidaya Dinamika Sejati – Jember. Value Stream Mapping (VSM) and Process Activity Mapping (PAM) methods are used to identify non-value-added activities. Root Cause Analysis, Pareto Diagram, and Fishbone Diagram are employed as supporting tools to analyze the main causes of waste. Agile Manufacturing is examined through the aspect of production flexibility. The results show that the dominant waste involves waiting time. After the implementation of improvements, there was an increase in production efficiency, and an improvement in process lead time. The integration of Lean and Agile Manufacturing has proven effective in enhancing the company's operational performance
Karbon Dots sebagai Sistem Penghantaran Obat Cerdas Berbasis Nanoteknologi
No full textCarbon dots (CDs) are carbon-based nanomaterials smaller than 10 nm that exhibit strong fluorescence, excellent chemical stability, and environmental friendliness, making them promising candidates for diverse applications. This paper discusses the synthesis methods of carbon dots, particularly bottom-up techniques such as pyrolysis and hydrothermal synthesis, using eco-friendly precursors like agricultural and food waste. CDs are characterized by techniques including FTIR, UV-Vis, and TEM to reveal their structural and optical properties. CDs have various applications, including heavy metal sensing, bioimaging, and antimicrobial agents. The key advantages of CDs include low production costs, abundant raw materials, and high biocompatibility. This study highlights the great potential of CDs in supporting environmentally friendly technologies and encourages further research on their functionalization and future applications
Efforts to Improve Customer Satisfaction with Wood Pellets Using the CARTER Method
No full textThis study aims to evaluate and improve customer satisfaction with wood pellets in Semarang by applying the CARTER method (Compliance, Assurance, Reliability, Tangibles, Empathy, and Responsiveness). A quantitative approach with an explanatory design was chosen to measure the impact of the CARTER intervention on customer perceptions. The sample consisted of 100 active wood pellet customers who were purposively selected (customers with ≥ 1 year of experience, had submitted complaints, and were willing to participate). Primary data was collected through a validated Likert scale 1–5 questionnaire (Cronbach's α gt; 0.6). The analysis included descriptive statistics, validity and reliability tests (SPSS 25). The results show that all CARTER dimensions scored an average of ≥ 4.0 on a 1–5 scale, indicating generally positive perceptions. Regression analysis revealed that Empathy and Responsiveness had the most significant impact on overall satisfaction. Based on the findings, the researcher recommends optimizing the logistics system through the use of digital platforms to improve delivery timeliness, enhancing service training focused on product expertise and quick solution capabilities, and strengthening transparency in communication regarding technical standards and environmental regulations to maintain customer trust. This study contributes theoretically by filling a research gap in the literature on customer satisfaction with wood pellets, which has primarily focused on technical production aspects. Practically, the findings offer a CARTER framework that can be adopted by wood pellet producers and distributors in Indonesia to enhance regional competitiveness and support the achievement of national renewable energy mix targets
Application Of Stepping Stone And Simplex Methods For Planting Optimization With Topsis As A Determining Criteria
Full text linkWonorejo Surabaya Nursery plays an important role in providing plants for green open spaces and urban greening programs. This poses challenges in managing the efficiency of land allocation, plant selection, and seed distribution. This study aims to develop an integrative model using the TOPSIS method to determine the best plant criteria, as well as the Stepping Stone and Simplex methods for optimizing distribution and resource allocation. TOPSIS is used to evaluate plant alternatives based on five main criteria. The results of the study show four priority plants, namely Bromeliad (0.47487), Gandasuli (0.46952), Spiderlili (0.45214), and Adam Hawa (0.59221). The next step is to create a Simplex model with 5 existing constraints, namely land area, water availability, number of workers, personnel working hours, and soil and compost availability. The Z max value is 23.668 with the Adam Hawa decision variable value of 40. For the distribution model, the Northwest Corner method is used and optimized with the Stepping Stone method, resulting in an efficiency of 0.88%. The integration of TOPSIS, Stepping Stone, and Simplex can reduce operational costs and also improve the quality of decision-making to truly support the sustainability of the city's environment
Pengaruh Bentuk Debu Terhadap Minimum Ignition Energy (MIE) Pada Debu Serbuk Kayu
No full textDust explosion is a serious threat in industries that involve the processing and storage of powdery materials, such as flour, sugar, wood, and so on. The aim of this study was to determine the effect of dust shape on MIE. Irregular and spherical wood dust was dried for 1 hour, 2 hours, 3 hours, 4 hours and 5 hours and then tested for moisture content. Samples dried for 1 hour had a moisture content of about 13%. Samples dried for 2 hours have a moisture content of about 9%. The sample dried for 3 hours has a moisture content of about 7%. The sample dried for 4 hours has a moisture content of about 6.5%. Samples dried for 5 hours have a moisture content of about 6%. After knowing the water content, each sample is weighed as much as 1 gram; 1.25 grams; 1.5 grams; 1.75 grams; 2 grams and then tested using a Dust Explosion tool. Irregular samples have the highest MIE value of 6.3801 mJ and the smallest of 1.3936 mJ. Spherical samples have the highest MIE value of 7.7079 mJ and the smallest of 1.3951 mJ. The highest MIE value is at a concentration of 1 g/L and the smallest at a concentration of 2 g/L
Praktik Ekonomi Mandiri Berbasis Agrofarming sebagai Upaya Meningkatkan Minat Bertani GenZ
Full text linkProgram pelatihan dan pendampingan pembuatan Pupuk Organik Cair (POC), kompos, dan budidaya cabai di lahan demplot Desa Ncera dirancang untuk mengembangkan praktik ekonomi mandiri berbasis agrofarming, sekaligus menumbuhkan minat generasi muda, khususnya Gen Z, untuk terjun ke dunia pertanian. Peserta tidak hanya dibekali keterampilan mengolah limbah organik menjadi pupuk ramah lingkungan bernilai jual, tetapi juga diajarkan teknik budidaya cabai secara organik dan strategi pemasaran hasil panen. Hasil pendampingan menunjukkan terbentuknya Kelompok Wanita Tani (KWT) Lestari dan Komunitas Petani Gen Z (Kompeten) yang telah terverifikasi sebagai anggota Rumah Produksi. Kedua kelompok ini berhasil meningkatkan kapasitas produksi dan pemasaran POC, kompos, serta cabai secara mandiri, yang berdampak pada kenaikan pendapatan rumah tangga hingga 30% dan pengurangan ketergantungan terhadap pupuk kimia. Dengan melihat peluang bisnis yang nyata dan menjanjikan, para peserta berkomitmen melanjutkan kegiatan ini sebagai usaha berkelanjutan. Program ini membuktikan bahwa agrofarming bukan hanya menjaga kelestarian lingkungan, tetapi juga menjadi strategi efektif untuk membangun kemandirian ekonomi dan mendorong regenerasi petani.Kata kunci: agrofarming, minat bertani, ekonomi mandiri, generasi muda, pemberdayaa