Publisher: Universitas Muhammadiyah Surakarta   (Total: 33 journals)   [Sort by number of followers]

Showing 1 - 33 of 33 Journals sorted alphabetically
Benefit : Jurnal Manajemen dan Bisnis     Open Access  
Bioeksperimen : Jurnal Penelitian Biologi     Open Access  
Biomedika     Open Access  
Emitor : Jurnal Teknik Elektro     Open Access  
Forum Geografi     Open Access  
Indigenous : Jurnal Ilmiah Psikologi     Open Access  
Indonesian J. on Learning and Advanced Education     Open Access   (Followers: 1)
Iseedu : J. of Islamic Educational Thoughts and Practices     Open Access  
J. of Community Services and Engagement     Open Access   (Followers: 2)
J. of Islamic Economic Laws     Open Access  
J. of Nutraceuticals and Herbal Medicine     Open Access  
JRAMathEdu : J. of Research and Advances in Mathematics Education     Open Access   (Followers: 5)
Jurnal Ekonomi Pembangunan : Kajian Masalah Ekonomi dan Pembangunan     Open Access  
Jurnal Ilmiah Teknik Industri     Open Access  
Jurnal Jurisprudence     Open Access  
Jurnal Kesehatan     Open Access  
Jurnal Manajemen Dayasaing     Open Access  
Jurnal Pendidikan Ilmu Sosial     Open Access  
Jurnal Varidika     Open Access  
Kajian Linguistik dan Sastra     Open Access   (Followers: 3)
Khazanah Informatika     Open Access  
Komuniti : Jurnal Komunikasi dan Teknologi Informasi     Open Access   (Followers: 6)
Law and Justice     Open Access  
Manajemen Pendidikan     Open Access  
Media Mesin : Majalah Teknik Mesin     Open Access  
Pharmacon : Jurnal Farmasi Indonesia     Open Access  
Profesi Pendidikan Dasar     Open Access  
Profetika Jurnal Studi Islam     Open Access   (Followers: 1)
Riset Akuntansi dan Keuangan Indonesia     Open Access  
Sinektika : Jurnal Arsitektur     Open Access  
Suhuf     Open Access  
Tajdida : Jurnal Pemikiran dan Gerakan Muhammadiyah     Open Access  
Warta LPM     Open Access  
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Jurnal Ilmiah Teknik Industri
Number of Followers: 0  

  This is an Open Access Journal Open Access journal
ISSN (Print) 1412-6869 - ISSN (Online) 2460-4038
Published by Universitas Muhammadiyah Surakarta Homepage  [33 journals]
  • Experimental Ergonomic Approach in Analysis of Student Mental Workload in
           Using Learning Management System

    • Authors: Aiza Yudha Pratama, Achmad Zaki Yamani, Syauqie Muhammad Marier, Nurchasanah Nurchasanah, Muhammad Alim Safa'at
      Pages: 125 - 134
      Abstract: Student interactions with the devices and software used can result in excessive mental workload, which of course also has an impact on decreasing productivity and work functions and indirectly harms student health, as well as student interactions in using the Learning Management System (LMS). Which is expected to continue to be utilized and developed to achieve greater convenience and profit, LMS is expected to continue to be developed and utilized optimally. This study is intended to analyze the mental workload felt by students in the learning process through LMS. An experimental ergonomics approach is used in this study by applying the modified NASA-TLX method. The results of the research experiment show that students feel a high mental workload when using the assignment module, quiz module, and forum module on the LMS, these modules produce a high mental workload due to cognitive difficulty, instruction complexity, and work habits.
      PubDate: 2022-12-30
      DOI: 10.23917/jiti.v21i2.19742
      Issue No: Vol. 21, No. 2 (2022)
  • Safety Riding Analysis Using the PDCA Concept for Plumbing Fitting
           Industry Employees in Tangerang

    • Authors: Sofian Bastuti, Rini Alfatiyah
      Pages: 135 - 141
      Abstract: Based on Law No. 1 of 1970 every company must prevent accidents (including traffic accidents on the way to and from work), fires & occupational diseases. The problem in this study is the number of traffic accidents by employees of the Plumbing Fitting Company in Tangerang. The purpose of this study is to determine the factors that cause traffic accidents and provide solutions for preventing traffic accidents for company employees. Analysis of the factors causing traffic accidents uses the PDCA concept, where this concept has several stages, namely Plan, Do, Check, and Action. The result of this research is employee traffic accidents decreased from 16 accident cases to 3 accident cases or if calculated on average before repair 1.34 accident cases per month and after repair 0.3 accident cases per month decreased by 77.6%.
      PubDate: 2022-12-30
      DOI: 10.23917/jiti.v21i2.18151
      Issue No: Vol. 21, No. 2 (2022)
  • Integrated Production and Distribution Planning using Mathematical Model
           for Maximizing Profit

    • Authors: Lely Herlina, Muhammad Adha Ilhami, Kiki Dwi Safitri
      Pages: 142 - 148
      Abstract: In three-dimensional concurrent engineering context, product, process, and supply chain designs are approached by the imperative of concurrency principle. The imperative of concurrency proposes product architecture and supply chain architecture conducted simultaneously. The detailed product design and production process design are conducted simultaneously. While manufacturing system design is conducted simultaneously with logistic system design. This study concerns on integrating production planning with distribution planning in a new plastic bags plant. Since the plant is relatively new, the number of orders is still scarce. Therefore, production planning becomes critical. Producing more products than required creates inventories while producing as many as the order required creates an intermittent production schedule. A mathematical is developed to simultaneously schedule production and distribution to maximize profit. The model provides solutions on the number of materials to be delivered, the number of products produced and delivered within its period for the planning horizon. 
      PubDate: 2022-12-30
      DOI: 10.23917/jiti.v21i2.19731
      Issue No: Vol. 21, No. 2 (2022)
  • Data Mining Analytics Application for Estimating Used Car Price during the
           Covid-19 Pandemic in Indonesia

    • Authors: Bramantiyo Eko Putro, Dwi Indrawati
      Pages: 149 - 161
      Abstract: Covid-19 has resulted in an increase in the people's need for vehicle ownership in order to avoid public transportation. People’s purchasing power, on the other hand, has also weakened. Therefore, they prefer to purchase affordable cars, such as used cars. Moreover, the Luxury Goods Sales Tax (PPnBM) discounts were officially applied to the purchase of the new cars in March 2021. This study aims at estimating the price of used cars using several data mining algorithms, such as Random Forest, K-Nearest Neighbour (KNN), and Naïve Bayes. By employing the RapidMiner tool, this study was able to evaluate the attributes affecting car prices. From the experimental results, random forest producers have the highest accuracy of 95.46%.  Then, this study figured out that brand, engine capacity, kilometres, colours, years, number of passengers, and transmissions are the most influential attributes to determine the estimation of the used car prices.
      PubDate: 2022-12-30
      DOI: 10.23917/jiti.v21i2.18975
      Issue No: Vol. 21, No. 2 (2022)
  • The Effectiveness Level Analysis of Flask Less Molding Machine Using
           Overall Equipment Effectiveness (OEE) as An Improvement of Machine

    • Authors: Much. Djunaidi, Calvin Athallaric, Hafidh Munawir
      Pages: 162 - 168
      Abstract: CV. Okabawes Karya Logam is a metal foundry company in Ceper, Klaten, Central Java, Indonesia that uses automatic moulding machines. This company has implemented Total Productive Maintenance which is useful for increasing the overall effectiveness of the company. The use of Flask Less Horizontal Moulding Machine in production to make product moulds is one of the breakthroughs to achieve this effectiveness. However, the usage of the Flask Less Horizontal Moulding Machine cannot be maximized due to several problems. This research was conducted on the Flask Less Horizontal Molding Machine due to the large number of defects and downtime that often occur on machines which aim to measure the value of effectiveness by collecting some supporting data. This research begins by measuring the Overall Equipment Effectiveness (OEE) value, then identifies the root of the problem with the Fishbone Diagram which has 5 main factors that influence it and continues to provide solutions to the five root causes of the problem. The results showed that the Overall Equipment Effectiveness (OEE) value on the Flask Less Horizontal Moulding Machine was 58,53%, this value is below the standard because the Japan Institute of Plan Maintenance (JIPM) set a standard of 85%. There are also 5 main root causes of the Fishbone Diagram identification that have been given solutions.
      PubDate: 2022-12-30
      DOI: 10.23917/jiti.v21i2.20633
      Issue No: Vol. 21, No. 2 (2022)
  • Green Supply Chain Management Performance Measurement in Palembang Rubber

    • Authors: Masayu Rosyidah, Anindita Rahmalia Putri
      Pages: 169 - 174
      Abstract: Rubber is one of the non oil-gas product from South Sumatera. However, several companies in this sector are not yet concerned with environmental aspects. Most companies have a profit-oriented goal regardless of environmental aspects especially waste management. The environmental aspect has not been integrated into the supply chain in practice so that its implementation has not been effective. Green supply chain management is a way to integrate it. Applications of green supply chain management in companies could help to minimize the impact of environmental pollution. However GSCM performance measurement has not been widely carried out in the rubber processing industry, especially those located in South Sumatra. So the aim of this research is to analyze the performance of GSCM using the green SCOR model. The results showed that the value of GSCM performance in PT. Sunan Rubber Palembang is categorized as average with a value of 64.03.
      PubDate: 2022-12-30
      DOI: 10.23917/jiti.v21i2.19624
      Issue No: Vol. 21, No. 2 (2022)
  • Improving the Quality of Courier Services during a Pandemic with Theory of
           Inventive Problem Solving (TRIZ)

    • Authors: Nabila Noor Qisthani, Achmad Zaki Yamani, Isnaini Nurisusilawati, Farid Nugroho
      Pages: 175 - 182
      Abstract: The increase in transactions through e-commerce due to changes in consumer buying behavior during the COVID-19 pandemic affected the demand for logistics services for the delivery of goods. The quality of logistics services can affect customer satisfaction and loyalty, and logistics service companies must provide added value to the services provided. This is what underlies the making of this research to be able to provide innovation proposals and improve service quality to courier service providers to support government programs to improve the quality of national logistics services. The method used in this research is Logistic Service Quality (LSQ), which analyzes problems in courier services. Theory of Inventive Problem Solving (TRIZ) is used to solve problems in the object of research and provide suggestions for improvement.
      PubDate: 2022-12-30
      DOI: 10.23917/jiti.v21i2.17846
      Issue No: Vol. 21, No. 2 (2022)
  • Developing Rural Tourism: A Potential Contribution To Achieving
           Sustainable Development Goals

    • Authors: Nisrina Nafi’atul Huda, Farid Ma'ruf, Hapsoro Agung Jamiko
      Pages: 185 - 195
      Abstract: Rural development is one of the primary keys to achieving sustainable development goals. Important changes in rural development strategies become inevitable and can be accommodated through rural tourism. Nonetheless, the models of rural tourism development, which depict the stages in developing and maintaining rural tourism, are still minimal. This research is conducted to fill the research gap by designing a conceptual model of rural tourism development. One-on-one interviews with four rural tourism development experts are done separately. The voice recording during the interviews is transcribed immediately after the interviews and proceeds with data processing using the qualitative coding method, which consists of open, axial, and selective coding. The qualitative coding method shows two main stages in rural tourism development: pre-development and development. The pre-development set consists of motivation and forum group discussion, while the development stage consists of planning, organization arrangement, HR development, product development, and marketing.
      PubDate: 2022-12-30
      DOI: 10.23917/jiti.v21i2.18071
      Issue No: Vol. 21, No. 2 (2022)
  • Selection of Non-Thermal Technology for Honey Pasteurization Machine Using
           Multi-Criteria Decision Making

    • Authors: Muhammad Dani Setiawan, Lobes Herdiman, Taufiq Rochman
      Pages: 196 - 204
      Abstract: Abstract.  Honey is a natural food product from a sweet viscous substance formed from flower nectar by honey bees. Honey processing using the pasteurization method has limitations, one of which is temperature. As a result, fungi and spores present in honey have not been eliminated. Non-thermal technology (NTT) is a solution to this limitation, because NTT is a process that applies little or no heat, with the aim of food receiving microbial inactivation, and can extend life, maintain physical quality, nutrition, and sensory freshness. NTT is commonly used in industry, namely in High-Pressure Processing (HPP), Pulsed Electric Field (PEF), Pulsed Light, Cold Plasma (CL), and Ultra Sound (US). Adjustment to the characteristics of honey is the reason for choosing non-thermal technology. The selection was carried out using the MCDM method, which integrates AHP-TOPSIS. The result is PEF being the selected NTT with a relative closeness of 0.773.
      PubDate: 2022-12-30
      DOI: 10.23917/jiti.v21i2.19606
      Issue No: Vol. 21, No. 2 (2022)
  • Ergonomic Risk Evaluation to Minimize Musculoskeletal Disorders in SMEs
           Leather Shoes at Indonesia

    • Authors: Indah Pratiwi, Tiara Adhitama
      Pages: 205 - 214
      Abstract: This study was carried out at SME for the purpose of making leather shoes in the manufacturing process. Pattern, upper printing, finishing, and 16 other workstations are among the three workstations. Production operations are performed manually in a seated position that includes squatting, bending, or standing position that is repeated, and workers operate at average to rapid speeds for 7 hours each day. This signifies that the action is hazardous and may result in Musculoskeletal Disorders (MSDs). The Job Strain Index (JSI) and Muscle Fatigue Assessment (MFA) methodologies will be used in this study to identify working posture conditions. The MFA method is used to analyze the level of effort, duration of labor, and frequency of work motions in order to determine muscle tiredness in each section of the worker's body. The 14 activities were subjected to the JSI method investigation, and the high risk was achieved by printing the top right hand SI 20.25 and installing the right-hand sole 13.5. The MFA approach was used to accept high to extremely high-risk body parts, such as the back, neck, and right hand, and make recommendations for how to reduce muscle fatigue in each body part. The findings of this study can be used to improve the upper printing station's design, as well as the table design for designing and drawing patterns and the chair design for sewing activities.
      PubDate: 2022-12-30
      DOI: 10.23917/jiti.v21i2.19502
      Issue No: Vol. 21, No. 2 (2022)
  • Work Facility Design of the Ergonomic Tempeh Plastic Wraps Punching Tool
           Reduces Musculoskeletal Complaints and Working Time (A Case Study at MSME
           HM Tempe Murni, Ngoto, Yogyakarta)

    • Authors: Tri Budiyanto, Titan Restu Pambajeng
      Pages: 215 - 224
      Abstract: Abstract.   Tempe Murni small unit is a tempeh processing business located in Ngoto, Bangunharjo, Sewon, Bantul, Yogyakarta. There was a work process which caused muscle fatigue on the process of making holes on the tempeh wraps using manual tool because it had not met the ergonomic standard. The work posture of the workers in doing the work was sitting on the floor, the left leg was folded inward and the right leg was stretched forward a little bit, thus, it might cause musculoskeletal complaints. Therefore, it required an ergonomic tempeh plastic wrap punching tool which could reduce the musculoskeletal complaints and the working time of the workers.The research object was the workers in the process of making holes on the tempeh plastic wraps. This research used ergonomic and anthropometric approaches to determine the dimensions of the workers’ bodies. The Nordic Body Map (NBM) and the Visual Analogue Scale were used to determine the musculoskeletal complaints of workers.The results showed that the ergonomic design of the punching tool could reduce musculoskeletal complaints of pain sensation on the upper neck from the initial Visual Analog Scala (VAS) score of 65 into mild pain category with the scale score of 25. The initial back pain complaint with a moderate category with the scale score of 70 was reduced into mild pain category with the scale score of 16. The initial moderate pain on waist with the scale score of 70 was reduced into mild pain with the scale score of 18. The initial moderate pain on buttocks with the scale score of 70 was reduced into mild pain with the scale score of 26. The initial moderate pain on the lower part of the buttocks with a scale score of 69 was reduced into mild pain with a scale score of 29. The working time was reduced from 1.03 hours/unit into 0.52 hour/unit.
      PubDate: 2022-12-30
      DOI: 10.23917/jiti.v21i2.19744
      Issue No: Vol. 21, No. 2 (2022)
  • Calendering Machine Performance Analysis to Improve The Smoothness of

    • Authors: S. ; Suharno, Alisya Eka Putri, Hermawan Yudha Prasetya, Qodry Al Basyir Amir, Rifki Hikmawan, J. Joemintono
      Pages: 225 - 231
      Abstract: This research aims to analyze the performance of the batik ironing machine (calendering) towards ensuring optimal finishing due to the problems associated with the inability to measure the mechanical system of its roll which normally leads to the unevenness of the products. Finishing is an important process in batik production and this is commonly achieved through the calendering machine which is known as one of the mechanical refinements involving a rolling process conducted using high temperatures and pressures to produce fabric products with a flat, smooth, and shiny surface and also create a smooth, moire, and an embossed effect. It is, however, important to note that operators in the batik industry are currently being faced with the problems of finishing and this means there is a need for the appropriate tool for refinement of the fabric. Therefore, this observational study was conducted with the focus on identifying the main components and calculating the mechanical strength of the calendering machine in the batik industry. This involved using the solid work software and the results showed that the calendering machine generally consists of five rolls divided into three metal and two soft rolls. The metal roll has a smooth surface with a hole in the middle for heating which implies it functions as the ironing tool while the soft roll serves as a pressure booster during the ironing process. Moreover, the analysis of structural mechanics showed that the machine has the ability to iron 3.53 meters of fabric in 1 minute. It was also observed that it has six main parts which are the preparation, roller calendar, engine frame, transmission system, boiler engine, and special cooling. The machine was able to produce a batik fabric with a flat, smooth, and shiny surface, thereby, increasing its quality
      PubDate: 2022-12-30
      DOI: 10.23917/jiti.v21i2.18023
      Issue No: Vol. 21, No. 2 (2022)
  • Evaluating Economic and Environmental Impact of A Plastic Waste Processing
           Industry nased on Circular Economy using Benefit-Cost Analysis

    • Authors: Asep Ridwan, Triwin R. Ambarwaty, Nuraida Wahyuni, Dyah L. Trenggonowati, Achmad Bahauddin, Ani Umyati, Bobby Kurniawan
      Pages: 232 - 239
      Abstract: Plastic has played a dominant role in human life as its usage is increasing over time. Plastic waste can harm the environment because plastic is not biodegradable. A collaboration adopted from the quintuple helix model was initiated by the local government of Cilegon, Indonesia, industry, and community to tackle the plastic waste problem. Plastic waste from households and industry is collected and processed in the plastic waste processing industry using the pyrolysis method producing gasoline, diesel, and kerosene. Kerosene is used by the community as fuel for cooking, whereas diesel and gasoline are used as boat fuels by fishermen. The collaboration is expected to provide economic and environmental benefits for the people in the Cilegon area. We conducted a cost and benefit analysis to evaluate the feasibility of this project from an economic and ecological point of view. The results will be used as input for conducting similar projects in other cities.
      PubDate: 2022-12-30
      DOI: 10.23917/jiti.v21i2.19751
      Issue No: Vol. 21, No. 2 (2022)
  • Integrating Lean Implementation and Relayout Design for Efficiency

    • Authors: Muhammad Ikhlasul Amal, Nina Aini Mahbubah
      Pages: 240 - 252
      Abstract: Eliminating non-value-added (NVA) activities is a comprehensive solution to achieve efficiency in manufacturing industry production processes. Inefficiency arises whether the production facility and equipment are recent or timeworn. Division. Soybean Production PT. YZ seeks to evaluate the inefficiencies in the relatively new soybean production and packaging plan. The incompatibility of the layout of the production floor facilities was identified as the leading cause of the inability of the Soybean Production Division to meet consumer demands. This study aims to make the production floor layout based on material handling costs, provide good layout alternatives, minimize lead times, and increase cycle efficiency in production processes. The research method integrates Systematic Layout Planning (SLP) and the Lean Manufacturing approach. Value Stream Map (VSM) as a study result distinguishing waste, namely motion and waiting for the material transfer process, which leads to non-value added activity. The best alternative layout proposal was obtained, namely the second Alternative, with the results of minimizing material handling costs by 26% and time-wasting by 19%. VSM and Relayout design provide significant improvement in eliminating losses as well as efficiency improvement.
      PubDate: 2022-12-30
      DOI: 10.23917/jiti.v21i2.19748
      Issue No: Vol. 21, No. 2 (2022)
  • Factors Affecting Green Purchase Behavior of AMDK Aqua Life on College
           Student Consumers in Surakarta City

    • Authors: Evy Nuryudhiani, Lobes Herdiman, Susy Susmartini
      Pages: 253 - 263
      Abstract: The fundamental accomplishment of the Sustainable Packaging Coalition (SPC) concept is to replace unnecessary plastics used in the packaging and towards a green packaged product concept that is sustainable and environmentally friendly. Aqua Life's innovative bottled water contributes to achieving sustainability with packaging made from recycled and recyclable materials. Consequently, this study extended the Value Attitude Behavior (VAB) model by using the following construct: environmental consciousness, attitudes toward environmental issues, attitudes toward eco-social benefits, green product information, green product quality, availability of desired green packaged products, and green product attributes; to explain consumers’ green purchase behavior. This study was to survey 251 college students in Surakarta city. The data were analyzed using the Partial Least Square-Structural Equation Model (PLS-SEM) method. The results show that environmental consciousness, attitudes toward environmental issues, green product information, availability of desired green packaged products, and green product attribute as a significant predictor
      PubDate: 2022-12-30
      DOI: 10.23917/jiti.v21i2.19608
      Issue No: Vol. 21, No. 2 (2022)
  • Kano Model Analysis for Measuring Visitor's Perception Towards Facility
           and Services in Teluk Penyu Tourism Area

    • Authors: Mohammad Dolla, Famila Dwi Winati, Fauzan Romadlon
      Pages: 264 - 273
      Abstract: The current phenomenon is that many areas have the potential as tourist destinations but are not managed and equipped with proper facilities as tourist areas. Teluk Penyu is one of the tourism destinations that have the potential to develop. Therefore, improvements to the management of the Teluk Penyu need to be made to increase the interest of visiting tourists. This study uses the Kano Model, which focuses on the facilities and presents the Tourist Attraction Variable (A4), including accessibility, amenities, attractions, and ancillary. The results of this study indicate that the satisfaction attributes of A4 can be grouped into Kano's satisfaction category, namely one attribute in the must-be category, eight in one-dimensional, seven in attractive, and four in indifferent. Therefore, the priority for improvement starts from the must-be, one-dimensional, and attractive categories.
      PubDate: 2022-12-30
      DOI: 10.23917/jiti.v21i2.19749
      Issue No: Vol. 21, No. 2 (2022)
  • Evaluation of Agricultural Work Environment with Ergonomic Checkpoints in
           Demangan, Siman, Ponorogo

    • Authors: Ratih Andhika Akbar Rahma, Fahri Cahyo Satria, Aisy Rahmania, Rindang Diannita
      Pages: 274 - 280
      Abstract: An ergonomic checkpoint is a method for evaluating the current work environment and implementing a more suitable work environment. When workers do work activities, the work environment is a critical component. Ergonomics is described as studying human factors in the workplace, including anatomy, physiology, psychology, engineering, management, and design. Based on preliminary observations, several activities allow potential hazards to arise, such as farmers’ lack of understanding of Personal Protective Equipment (PPE) when spraying pesticides and farmers’ use of t-shirts as a mask. Farmers repeated movements with a bent body position when planting rice seeds, which can cause potential health problems such as musculoskeletal. Using descriptive observational research, this study tries to objectively establish the conditions of the work environment concerning the circumstances. The Ergonomic Checkpoints method was used for data collecting. The results of the work environment assessment using the Ergonomic Checkpoints method in agriculture in Demangan Village revealed that five aspects that required corrective action, consisting of materials storage, and handling, had two points of incompatibility, machine safety had one moment of incompatibility, premises/workspace had one moment of incompatibility, and welfare facility had one moment of mismatch. Farmers in Demangan village should use Ergonomic Checkpoints to pay attention to the work environment in keeping with agricultural standards.
      PubDate: 2022-12-30
      DOI: 10.23917/jiti.v21i2.18709
      Issue No: Vol. 21, No. 2 (2022)
  • Selecting The Best Broiler Chicken Supplier of PT Sentral Unggas Perkasa
           Using Analytical Hierarchy Process and Weighted Product Methods

    • Authors: Yuniar Farida, Putri Krismadewi, Dian Yuliati, Hani Khaulasari
      Pages: 281 - 290
      Abstract: PT SUP is one of the companies engaged in trading broiler chicken products. Supplying broiler chickens to PT SUP sometimes results in product instability, and some conditions are inadequate; the financing process is not by income or obstacles that occur when serving customers. So this can disappoint the customers of PT SUP. This study aims to select suppliers for 4 out of 6 breeders chosen as the best suppliers and will get a reward from PT SUP to improve the performance and product results of the suppliers. The selection of the best supplier is based on the criteria that have been owned, namely Based on Curriculum Vitae (CV), location of the cage, capital, and service. The six suppliers come from 3 (each city has two suppliers), namely Lumajang, Lamongan, and Kediri. In this study, the author uses the AHP (Analytic Hierarchy Process) method to produce a consistent value of comparison results. It can be continued with the WP (Weighted Product) approach to get the value of the V vector for ranking alternatives. PT SUP will beard the results of the selection of the best four suppliers. The best supplier of PT SUP are Y1, Y4, Y2 dan Y3. Combining these two methods is a form of contribution to the MCDM enrichment.
      PubDate: 2022-12-30
      DOI: 10.23917/jiti.v21i2.18045
      Issue No: Vol. 21, No. 2 (2022)
  • Human Reliability Analysis on Fresh Fruit Bunches Sorting Workers

    • Authors: Agustina Hotma Uli Tumanggor, Chynthia Eka Fayuning Tjomiadi, Madschen Sia Mei Ol Siska Selvija Tambun
      Pages: 291 - 300
      Abstract: Demand for Crude Palm Oil (CPO) at PT. Wijaya Borneo Tiganna for this year has increased. However, the increase in production was not in line with human error of 74% in the Fresh Fruit Bunches (FFB) Sorting Department from the 80% minimum percentage desired by the company. The purpose of this study was to analyze the reliability value of sorting workers. The method used is the Human Reliability Assessment Method seen from related tasks and context related to identify Human Error Probability (HEP) with a fault tree to provide recommendations for reducing human error. There are 3 types of rework in the TBS Sorting Section. The HEP using the HEART method is 1.1103148 while the CREAM method is 0.10608. The reliability of workers in carrying out tasks can still be improved with skills and accuracy in the sorting and grading of FFB.
      PubDate: 2022-12-30
      DOI: 10.23917/jiti.v21i2.19713
      Issue No: Vol. 21, No. 2 (2022)
  • A Stochastic Integrated Inventory Model Single Supplier-Single Retailer in
           Periodic Review with Losing Flexibility Cost

    • Authors: Rizqi Afrizal, Utaminingsih Linarti
      Pages: 301 - 310
      Abstract: Efficiency in the supply chain can be established by integrating the supplier-retailer inventory policy. This article proposes the integrated inventory model between supplier-retailer under stochastic demand. This model aims to determine the optimal review period and calculate the total inventory cost, including some defective items, backorder price discounts, and losing flexibility costs. We assume that the retailer can order  'n' times for every 'm' shipment from supplier to retailer in each production cycle under a periodic review. Stochastic conditions can cause sudden changes in orders by the retailer in large quantities, eventually forcing the supplier to reduce their setup policies. This condition makes the retailer be charged a losing flexibility cost as compensation for the reduction setup pushed by the supplier in a long-term partnership contract. Based on numerical examples and sensitivity analysis, the percentage of defective items in each shipment from supplier to retailer significantly affects integrated total inventory cost.
      PubDate: 2022-12-30
      DOI: 10.23917/jiti.v21i2.19752
      Issue No: Vol. 21, No. 2 (2022)
  • Optimization of Vehicle Routing Problem Using Particle Swarm Optimization:
           A Case Study Watering Plants in Yogyakarta City

    • Authors: Riski Andriyansah, Utaminingsih Linarti
      Pages: 311 - 320
      Abstract: Dinas Lingkungan Hidup (DLH) Yogyakarta City always tries to monitor, control, and control activities regarding all aspects of the environment, one of which is watering plants. The right path must be selected so as not to exceed the time limit set. This study aims to determine the direction of watering plants in Sector 3 for Vehicle Route Problem (VRP) using the Particle Swarm Optimization (PSO) and compare the performance results of the PSO method with the Genetic Algorithm (GA) in previous studies. The VRP criteria are heterogeneous fleet, intermediated facility, multi-trip, split delivery, and times window   (VRPHFIFMTSDTW). The results of the comparison between the two methods, namely, the GA method, are better than the PSO method in terms of computational time efficiency and fitness value. The total travel time for the GA method is 22 minutes, or 2.1% faster than the PSO method. In contrast, the total distance traveled by the PSO method is 345 meters shorter than the GA method. These two methods' results are also excellent compared to the current watering route. The difference in total mileage is about 20.4%, and total travel time is about 11.7% between the two methods.
      PubDate: 2022-12-30
      DOI: 10.23917/jiti.v21i2.19753
      Issue No: Vol. 21, No. 2 (2022)
  • The Development of Human-Robot Collaborative Assembly Line Model by
           Considering Availability of Robots, Tools, and Setup Time

    • Authors: Anas Maruf
      Pages: 321 - 329
      Abstract: This research develops a design model of a human-robot collaboration assembly line by taking into account the number of robots, tools, and setup time. The objective function of the proposed mixed integer linear programming model is to minimize cycle time. The results of model testing utilizing various scenarios reveal that the number of available robots, tools, and setup time can all have an impact on the assignment of assembly tasks at workstations. In other words, the suggested model takes into account the practical constraints of human-robot collaboration assembly line design. Further research will be conducted to build efficient algorithms for identifying solutions that take into account the assembly line in companies with a significant number of assembly tasks.
      PubDate: 2022-12-30
      DOI: 10.23917/jiti.v21i2.19619
      Issue No: Vol. 21, No. 2 (2022)
School of Mathematical and Computer Sciences
Heriot-Watt University
Edinburgh, EH14 4AS, UK
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