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Jurnal Teknologi dan Manajemen
Published by Institut Teknologi Adhi Tama Surabaya
ISSN : -     EISSN : 27211878     DOI : https://doi.org/10.31284/j.jtm.2024.v5i1.5411
Core Subject : Engineering,
Engineering
Jurnal Teknologi dan Manajemen (JTM), ISSN 2721-1878, is an open-access journal dedicated to provide a platform in management and technology aspects. This journal aims to publish renewable works in implementation of basic theories, experiments, simulations, and applications with systematic method; reviews of previous works; expansions of summary; or others. This journal is published twice a year, on January and July.
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 147 Documents
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Analysis of Use Formwork and Slipform Pavers in Making Concrete Barrier on Toll Road Project Akhmad Taufik Aditama; Nina Saraswati; Puthut Satriawan
Jurnal Teknologi dan Manajemen Vol 7, No 1 (2026): January
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat ITATS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jtm.2026.v7i1.8308

Abstract

The making of concrete barrier on the KAPB Toll Road Project Package II Section 1 still uses manual formwork. The use of manual formwork is considered easier to implement, but less efficient because concrete barrier in the form of prototypes should be done practically. Innovation in the field of construction has created Slipform Paver to print concrete barrier. Slipform pavers are believed to be able to produce better productivity than manual formwork. This study analyzed productivity, work duration and costs in the use of molding concrete barrier as an effort to accelerate work. Observations on the making of concrete barrier were carried out in one cycle time from land preparation to finishing the work. Concrete barrier made with manual formwork use readymix concrete FC 20 slump + 10 cm, while slipform pavers use readymix concrete FC 20 slump 4-5 10 cm. The results of the study showed that in making concrete barrier the use of slipform pavers can accelerate the completion of work by up to 46.01% and save costs by 14.3% compared to using manual formwork. In working on all concrete barrier using manual formwork can be done, but requires additional resources so that it can be completed on time.
Determination of Technical Specifications for a Digital QR Code System Using Axiomatic House of Quality for Error Prevention Wulung Aditya; Ni Luh Putu Hariastuti
Jurnal Teknologi dan Manajemen Vol 7, No 1 (2026): January
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat ITATS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jtm.2026.v7i1.8184

Abstract

This 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 perspective
Application Of Stepping Stone And Simplex Methods For Planting Optimization With Topsis As A Determining Criteria Rudi Hartono; Lukmandono Lukmandono
Jurnal Teknologi dan Manajemen Vol 7, No 1 (2026): January
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat ITATS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jtm.2026.v7i1.8266

Abstract

Wonorejo 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.
Reducing Material Loss in Gold Bracelet Production Using Material Flow Cost Accounting and Value Stream Mapping Andreas Dhiyong Pratama; Lukmandono Lukmandono; Gatot Basuki Hari Mukti
Jurnal Teknologi dan Manajemen Vol 7, No 2 (2026): July
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat ITATS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jtm.2026.v7i2.9242

Abstract

Material loss is a critical issue in gold jewelry manufacturing because it increases production costs and reduces resource utilization efficiency. This study aims to identify material loss and its associated costs using Material Flow Cost Accounting (MFCA), analyze production waste through Value Stream Mapping (VSM), determine the root causes of inefficiencies using a Fishbone Diagram, and develop improvement strategies based on the 5W+1H approach. A quantitative descriptive method was employed using production data from the Morena 12K bracelet manufacturing process at PT XYZ during the period of Desember 2025 to February 2026. MFCA was applied to quantify material flow and classify production costs into positive and negative costs, while Current State Value Stream Mapping (CSVSM) was used to identify value-added and non-value-added activities. The results indicated that material loss fluctuated between 10.39% and 23.06%, resulting in negative costs ranging from IDR 1.07 billion to IDR 2.89 billion. Waste analysis revealed that waiting and defect were the dominant sources of inefficiency, primarily caused by machine downtime, CNC setup, and finishing operations. The proposed improvements, developed using the 5W+1H approach and evaluated through Future State Value Stream Mapping (FSVSM), reduced production lead time from 421.417 minutes to 381.967 minutes and increased Process Cycle Efficiency (PCE) from 35.29% to 42.71%. Furthermore, the Future MFCA evaluation demonstrated a reduction in negative costs and material loss, accompanied by an increase in positive costs, indicating more efficient material utilization and improved production performance. These findings demonstrate that integrating MFCA and VSM is an effective approach to minimizing material loss, reducing hidden production costs, and supporting continuous improvement in gold jewelry manufacturing.
Integration of Google ML Kit and OpenCV for Android-Based Document Digitization and Archive Management Sugiyanto Sugiyanto; Eka Bagus Surya; Achmad Wahyu Satrio Wibisono
Jurnal Teknologi dan Manajemen Vol 7, No 2 (2026): July
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat ITATS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jtm.2026.v7i2.9264

Abstract

Digitalization of documents is an important necessity for supporting more efficient, practical, and easily accessible archive storage through mobile devices. However, document scanning using a smartphone camera still frequently produces suboptimal images due to lighting conditions, image-capture angle, and perspective distortion. This research develops the Android-based application Digital Portable Archive and Document Assistant (D-PANDA) by integrating the Google ML Kit Document Scanner API for automatic document detection and OpenCV for image quality enhancement, with a PHP Native backend and MariaDB database. Unlike commercial black-box solutions, D-PANDA provides full algorithmic transparency through its documented OpenCV-based post-processing pipeline, and offers a self-hosted backend alternative for organizations prioritizing data sovereignty. Testing was conducted using Black Box Testing to verify that all application functions operate according to requirements, as well as the User Experience Questionnaire Short (UEQ-S) with 15 respondents to evaluate the user experience. Black Box testing results indicate that all application features function correctly, with no functional errors detected. Meanwhile, the UEQ-S evaluation yielded scores of Pragmatic Quality = 2.232, Hedonic Quality = 2.286, and Overall = 2.259, all in the Excellent category, indicating that the application ranks among the top 10% of results according to the UEQ-S benchmark. The research findings demonstrate that D-PANDA effectively supports document digitalization and management while delivering a very positive user experience.
An Integrated IPMS–MAFMA Framework for Improving the Operational Efficiency of Clean Water Distribution Pump Systems Ni Luh Putu Hariastuti; Muhammad Irfan
Jurnal Teknologi dan Manajemen Vol 7, No 2 (2026): July
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat ITATS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jtm.2026.v7i2.9234

Abstract

PT. XYZ is a local government-owned company responsible for providing clean water services to the residents of Surabaya. To ensure reliable water distribution, the company must maintain high operational performance of its distribution pump system. However, operational activities are frequently disrupted by equipment failures and inadequate maintenance practices, resulting in reduced efficiency and service reliability. This study aims to improve operational performance and minimize machine failures by integrating the Integrated Performance Measurement System (IPMS) and Multi-Attribute Failure Mode Analysis (MAFMA) at the Central Distribution Pump House. The IPMS method was employed to identify and prioritize Key Performance Indicators (KPIs) requiring performance improvement based on their relative weights. Subsequently, the MAFMA method was applied to identify potential failure modes, evaluate associated risks, and determine appropriate corrective actions. The results indicate that KPI 9, namely the completion of non-routine maintenance work, obtained the highest priority weight of 0.174, indicating that it should be the primary focus for performance improvement. Furthermore, the MAFMA analysis identified a damaged foot valve as the most critical failure mode, with the highest Risk Priority Number (RPN) of 168. Based on these findings, the proposed improvements include developing contingency plans to manage unexpected priority changes and implementing routine inspection and cleaning of pump components every two days to reduce the likelihood of equipment failure. The integration of IPMS and MAFMA provides a systematic approach for enhancing maintenance performance, improving operational reliability, and supporting sustainable clean water services.
Mapping Slip Trip & Fall and Crowd Crush Hazards at Fisherman's Wharf: A Triangulation of Physical, Observational, and Survey Data Alicya Rosa Kumalaratri; Lukmandono Lukmandono; Po Hsiang Liu; Yoniv Erdhianto
Jurnal Teknologi dan Manajemen Vol 7, No 2 (2026): July
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat ITATS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jtm.2026.v7i2.9223

Abstract

Fisherman’s Wharf in Tamsui, Taiwan, is a popular coastal tourist destination that attracts large numbers of visitors, increasing the likelihood of Slip, Trip and Fall (STF) and Crowd Crush hazards. This study evaluates risk levels, examines hazard-generating activities, and identifies the root causes of risk to develop more effective and sustainable control measures. It integrates Hazard Identification and Risk Assessment (HIRA), Job Safety Analysis (JSA), and Root Cause Analysis (RCA) within a comprehensive risk assessment framework. Data derive from 300 hours of field observation, visual documentation, and a survey of 96 respondents, including visitors, employees, and site managers. HIRA assesses risk levels and identifies priority areas, JSA examines high-risk activities, and RCA investigates the underlying causes of risk. The results show that Zone C (Floating Pier and Stairs) presents the highest STF risk, with a HIRA score of 12 (High Risk), while Zone B (Lover’s Bridge) records the highest Crowd Crush risk, with a HIRA score of 16 (High Risk). Walking on damp and slippery surfaces emerges as the principal contributor to STF incidents. In contrast, visitor congestion, two-way pedestrian flows, and the tendency of visitors to stop for photographs drive Crowd Crush risks. RCA findings highlight several key root causes, including inadequate anti-slip surface treatments, insufficient preventive facility inspections, and ineffective crowd management practices. These findings underline the need to upgrade physical infrastructure, improve visitor flow management, and strengthen safety systems through systematic near-miss monitoring and reporting.
Urban Drainage Channel Redesign Based on Design Flood Analysis: A Case Study of Gunung Anyar Kidul, Surabaya Erna Dwi Rahayu; Ameylia Fatimah; Nabilla Ayu Januarista; Nur Syiefa Hidayah; Sandy Reza Al Rasyid; Aisyah Dwi Puspasari
Jurnal Teknologi dan Manajemen Vol 7, No 2 (2026): July
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat ITATS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jtm.2026.v7i2.9259

Abstract

Rapid urban development has significantly increased impervious surfaces, resulting in higher surface runoff and frequent urban flooding. Gunung Anyar Kidul, one of the rapidly developing residential areas in Surabaya, has experienced recurring inundation due to inadequate drainage capacity. This study aims to evaluate the hydraulic performance of the existing secondary drainage channel and propose an optimal channel redesign based on the design flood discharge. Hydrological analysis was conducted using the Gumbel distribution to estimate the five-year return period rainfall, while the Rational Method was employed to calculate the design discharge following the Indonesian Standard (SNI 2415:2016). Hydraulic capacity was evaluated using Manning's equation. The results indicate that the five-year design rainfall reached 169.288 mm/day, producing a rainfall intensity of 177.087 mm/h and a design discharge of 7.583 m³/s. The existing channel capacity was only 2.793 m³/s, indicating that the drainage system is hydraulically insufficient. A redesigned trapezoidal channel with a bottom width of 1.80 m and a flow depth of 1.50 m increased the channel capacity to 7.83 m³/s, satisfying both the design discharge and the freeboard requirement specified in SNI 03-3424-1994. The findings demonstrate that channel enlargement combined with routine maintenance can substantially improve drainage performance and reduce urban flood risk in Gunung Anyar Kidul.
Modeling of Flood Inundation Due to the Overflow of the Bengawan Madiun River Using HEC-HMS and HEC-RAS 2D Aviar Yusuf Affendi; Mahendra Andiek Maulana; Mohamad Bagus Ansori
Jurnal Teknologi dan Manajemen Vol 7, No 2 (2026): July
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat ITATS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jtm.2026.v7i2.9188

Abstract

Bengawan Madiun is one of the main tributaries of the Bengawan Solo River, playing a critical role in the hydrological system of the Bengawan Solo Watershed. Limited river capacity, upstream land-use change, and increasing rainfall intensity have caused recurrent flooding in Ngawi Regency, particularly in Kwadungan and Pangkur Districts. A significant flood event occurred on 29 March 2025, inundating settlements, farmland, and infrastructure across the study area. This study aims to model flood inundation resulting from the overflow of the Bengawan Madiun River, evaluate model reliability, and analyze inundation characteristics under various return period discharge scenarios as a basis for flood mitigation recommendations. The average watershed rainfall of 72.80 mm was distributed into hourly rainfall using the Sri Harto method as input for HEC-HMS modeling. Calibration of the daily discharge model for the flood event of 29 March 2025 yielded an NSE of 0,85 and R² of 0,89, indicating that the model accurately represents the rainfall-runoff relationship of the Bengawan Madiun Watershed with a very high degree of accuracy. The HEC-RAS 2D simulation under existing conditions revealed a total inundation area of 6.329 km², concentrated in the lowland areas of Kwadungan and Pangkur Districts, with model validation yielding an RMSE of 0,03 m and NSE of 0,73. Return period discharge simulations demonstrated a consistent increase in inundation area from 1.654 km² at Q5 to 15.038 km² at Q50, with the 29 March 2025 flood event hydrologically identified as equivalent to a return period of 10 to 25 years. Based on these findings, river normalization and embankment construction along the critical segments of Bengawan Madiun are recommended as structural mitigation measures to significantly reduce flood inundation risk in Ngawi Regency.
Evaluation of Slagging and Fouling Indices in Boilers, for Steam Power Plant Prima Aryandi; Jusfarida Jusfarida; Hendra Bahar; Avelyn Shintya Sari; Fairus Atika Redianto Putri; Korchnoi Pasaribu
Jurnal Teknologi dan Manajemen Vol 7, No 2 (2026): July
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat ITATS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jtm.2026.v7i2.9214

Abstract

Coal acts as the primary fuel for the boiler at PLTU to support the combustion process. The boiler serves as the main steam generator in this coal-fired power plant. During combustion, coal produces ash that deposits and leads to slagging and fouling, two conditions that reduce boiler efficiency and performance. This study analyses how slagging and fouling affect the performance of Boiler at PLTU. Using a quantitative approach, the research evaluates coal quality data (proximate and ultimate analyses), ash compound content, sulphur levels, and calculates slagging and fouling indices in relation to boiler performance. The results show that the slagging index ranges from 0.15 to 0.77 and the fouling index from 0.19 to 0.48, indicating a low to moderate tendency. When these indices are at their lowest, boiler efficiency reaches 88.05% (direct method) and 86.09% (indirect method). At their highest, efficiency drops to 78.25% and 78.65%, respectively. This decline increases coal consumption for electricity generation. These findings highlight the need for regular inspection of ash content and coal quality to reduce the negative effects of slagging and fouling on overall boiler performance.

Page 14 of 15 | Total Record : 147

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