Jurnal Sistem Teknik Industri 2023-01-28T10:25:52+07:00 Ir. Rosnani Ginting, MT, Ph.D, IPU, ASEAN Eng Open Journal Systems <p style="text-align: justify;">Jurnal Sistem Teknik Industri (JSTI) of Universitas Sumatera Utara, Faculty of Engineering, Department of Industrial Engineering, was published in 1998. Until now, the number of publications has reached 24 volumes, each of which is published <span style="display: inline !important; float: none; background-color: transparent; color: rgba(0, 0, 0, 0.87); font-family: Lato,sans-serif; font-size: 14px; font-style: normal; font-variant: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: justify; text-decoration: none; text-indent: 0px; text-transform: none; -webkit-text-stroke-width: 0px; white-space: normal; word-spacing: 0px;">by TALENTA Publisher</span> twice a year . Each volume has two publishing numbers, namely January issue numbers and July issue numbers. Currently, <span style="display: inline !important; float: none; background-color: transparent; color: #000000; cursor: text; font-family: 'Noto Sans',Arial,Helvetica,sans-serif; font-size: 14px; font-style: normal; font-variant: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: left; text-decoration: none; text-indent: 0px; text-transform: none; -webkit-text-stroke-width: 0px; white-space: normal; word-spacing: 0px;">Jurnal Sistem Teknik Industri (JSTI)</span> Vol. 25 Number 2 will be published. The Department of Industrial Engineering requires all lecturers and students to produce journals to be published, one of which is in JSTI.</p> <p style="text-align: justify;">JSTI was published with print ISSN <a href="" target="_blank" rel="noopener">1411-5247</a> and ISSN Online <a href="" target="_blank" rel="noopener">2527-9408</a>. JSTI has been accredited as Sinta 4 journal based on <a title="Sinta Akreditasi" href="" target="_blank" rel="noopener">B / 3693 / E5 / E5.2.1 / 2019 .</a></p> Strategic Planning Based on the Impact of Social Support and Social Trust on COVID-19 Risk Response in Formal and Informal Workers 2022-03-25T21:52:10+07:00 Karina Nisa Aprilia Erlinda Muslim <p>The COVID-19 pandemic has occurred throughout the world, and also in Indonesia. The government try to reduce the spread of COVID-19 by implementing various policies such as the large-scale social restriction (PSBB) policy, as well as other related policies. However, this policy has not been effective in view of the level of the spread of COVID-19 which has not decreased. Lack of public awareness is the cause of the spread of COVID-19 in Indonesia. For this reason, this study examines the effect of social support and social trust on the efficacy response to COVID-19 using the structural equation modeling (SEM) method. This factor was chosen because social support is an important aspect of the life of Indonesian society. This research was conducted on formal and informal workers, because workers are still required to have activities outside the home. The results show that social support and social trust are more influential on formal workers than informal workers. Strategy recommendations are compiled based on literature studies. After that, the weighting was done by using a relationship matrix. The results of the relationship matrix are seven prioritized strategies for formal workers, and three prioritized strategies for informal workers.</p> 2023-01-28T00:00:00+07:00 Copyright (c) 2023 Jurnal Sistem Teknik Industri Implementation of 5S in Improving of Palm Oil Mill Working Environment 2022-08-31T14:39:52+07:00 Khalida Syahputri Indah Rizkya Rahmi Meilina Sari Albert Lo <p>A work environment describes a place for employees affect them to do their tasks. A good work environment will certainly make employees do and spend all their energy and mind to work optimally. A comfortable feeling of the work environment can reduce boredom at work. This comfort feelings have an impact on increasing motivation and producing employee job satisfaction. The condition of the working environment in palm oil industry is currently classified as messy where there are still some tools scattered on the factory floor, there is mud and slippery puddles in various places such as floors or stairs. Conditions like this certainly need to be repaired immediately to avoid the risk of work accidents and increase employees' comfortable. Improvement of working environment conditions can be done by various methods, one of the methods is 5S method. 5S spelling as (<em>Seiri, Seiton, Seiso, Seiketsu, Shitsuke</em>) is one of the effective tool in management to improve the work culture of workers and the conditions of the work environment in a factory. Based on the evaluation results, the evaluation categories of 5S implementations are <em>Seiri</em> of 16 score, <em>Seiton</em> of 16 score, <em>Seiso</em> of 9 score, <em>Seiketsu</em> of 8 score, <em>Shitsuke</em> of 7 score. The results of this total score show the 5S value of palm oil mill is in the average score of 56 total score.</p> 2023-01-28T00:00:00+07:00 Copyright (c) 2023 Jurnal Sistem Teknik Industri Proposed Design of Sewing Process Improvement to Minimize Polyester Technical Sportswear Product Defect at PT. X Based on The DMAIC Method Approach 2022-12-15T18:21:11+07:00 Fandi Achmad Marina Yustiana Lubis Yunita Nugrahaini <p>Various companies want to improve product quality and process speed for customer satisfaction in the current era, including PT. X. Problems at PT. X is the number of defects that exceed the company's tolerance limit. The methodology used is a structured DMAIC method to identify the root causes of defects and resolve them. This study aimed to reduce defects in sportswear products caused by problems in the sewing process. The results showed that the problem in the sewing process was due to the process performance that still did not meet the standard process requirements, so the resulting output did not match the company's specifications. Therefore, it is necessary to design an alarm timer integrated with the sewing machine to minimize the frequency of defects in the sewing process. The design of the alarm timer uses the Reverse Engineering design method, which can minimize defects in the sewing process and increase the capability of the PT. X process.</p> 2023-01-28T00:00:00+07:00 Copyright (c) 2023 Jurnal Sistem Teknik Industri The Implementation Of Machine Learning In Demand Forecasting : A Review Of Method Used In Demand Forecasting With Machine Learning 2022-08-11T23:10:13+07:00 Sri Baginda Dalimunthe Rosnani Ginting Sukaria Sinulingga <p>Demand Forecasting is essentials in making production decisions. Demand forecasting accuracy affects supply chain management and can reduce its costs. The development of information technology, especially artificial intelligence, has many benefits in many industrial sectors. The development of artificial intelligence is also applied to demand forecasting. The development of Artificial Intelligence technology in forecasting can produce better accuracy than conventional methods that do not use Artificial Intelligence. The use of machine learning in demand forecasting is in various industrial sectors ranging from small-scale industry to large-scale industry. This article will discuss research on the use of machine learning in demand forecasting for the things discussed, including machine learning models, data processing methods, and research variables. The purpose of this review is to see a comparison of the accuracy of each model, method, and variable used in demand forecasting using machine learning. The results of the review show that the characteristics of different product fluctuations require a different demand forecasting model approach. An appropriate approach can produce higher forecasting accuracy. Mistake in choosing a demand forecasting model can reduce the accuracy of demand forecasting. The demand forecasting model must also need to be updated to improve accuracy.</p> 2023-01-30T00:00:00+07:00 Copyright (c) 2023 Jurnal Sistem Teknik Industri Path Balance Analysis with Artificial Bee and Fuzzy Algorithm Approach on Plastic Chopping Machine 2022-08-11T23:08:08+07:00 Muhammad Khatami Rosnani Ginting Aulia Ishak <p>Line balancing is a series of work stations (machinery and equipment) used in the manufacture of products. Line balancing usually consists of a number of work areas called work stations which are handled by one or more operators and it is possible to handle using various tools. The main purpose in compiling line balancing is to establish and balance the workload allocated to each work station. If the trajectory is not balanced, it can result in work inefficiency in several work stations where one work station with another has an unbalanced workload. The balancing of the machines used in the assembly process must also be done. Likewise in purchasing and designing machines that have the required capacity. In addition, balancing the machines used, both in the use of two machines to get the required capacity or slowing down machines that work too fast or turn on or turn off machines intermittently, needs to be done. In addition, balancing the machines used, both in the use of two machines to get the required capacity or slowing down machines that work too fast or turn on or turn off machines intermittently, and others need to be done. The problem of line balancing has received considerable attention perhaps beyond the usual assembly line. Several techniques produce the right solution for the given assumptions. Other techniques are designed to generate approximate solutions based on practical considerations. The main concern is not to achieve perfect balance but to obtain optimal layout and flow with respect to other production operations.</p> 2023-01-28T00:00:00+07:00 Copyright (c) 2023 Jurnal Sistem Teknik Industri Macro Ergonomic Analysis and Design for Optimizing the Work Environment : A Literature Review 2022-09-05T18:16:54+07:00 Suci Ayu Lestari Listiani Nurul huda Rosnani Ginting <p>The purpose of this literature is to understand the application of macroergonomics in various fields. Macroergonomics is the study of work systems which include organizational structures (complexity, formalization, centralization, policies, and processes) with a socio-technical approach used to improve work systems. The method used is a thematic analysis of articles on the application of macroergonomics in various industries. Based on the results of the article review, the process of implementing macroergonomics is analysis, design, implementation, control, and evaluation. All review articles carry out macro ergonomics analysis and design within the scope of the work system as a whole but do not intervene in all factors/problems. The reviewed articles show that the intervention is carried out only on a few factors, where human and organizational factors are always involved. The application of macroergonomics can achieve many goals at once that are beneficial to organizations, workers, and even consumers. The highest frequency of macro ergonomics objectives in consecutive review articles was: quality, occupational health, safety, work existence, productivity, efficiency, and effectiveness.</p> 2023-01-28T00:00:00+07:00 Copyright (c) 2023 Jurnal Sistem Teknik Industri Implementation of Macro Ergonomic Participatory In Physical Work Environment: A Literature Review 2022-09-05T18:02:08+07:00 Muhammad Candra Rosnani Ginting Listiani Nurul Huda <p>All types of work must have potential hazards in the work, namely work-related illnesses or work accidents. The level of potential occupational hazard is influenced by the type of production activity, the technology used, the materials used, the design and construction environment, and the quality of management and workers. Musculoskeletal disorders, caused not only by aging but also by unergonomic settings of the equipment used, are one of the frequent occupational diseases caused by worker-job mismatch. This study aims to review the participatory macroergonomics literature based on the collected references on the development and application of creating ergonomic physical work environments. Participatory methods are methods that aim to find solutions agreed upon by managers, workers and ergonomics experts, and the result of this research is the ergonomic design of work environments.</p> 2023-01-28T00:00:00+07:00 Copyright (c) 2023 Jurnal Sistem Teknik Industri Strategy Planning Based on Factors Affecting Behavior of Healthy Food Consumption 2022-12-15T17:44:54+07:00 Vanya Permata Azzura Erlinda Muslim <p>Healthy food is a basic human need that needs&nbsp;to be fulfilled every day. Eating healthy food is an effort to maintain a healthy body. In fact, many people still have a poor eating diet. Poor eating diet can cause a non-contagious disease. The high number of patients&nbsp;that suffer with diseases will be a burden for both the community and the state. This is because a non-contagious disease is a disease that is&nbsp;not contagious but has&nbsp;a high risk of death. A non-contagious disease patient will take a long time to be healed and the medication itself cost a lot of money. To maintain a healthy body consumption of healthy food is important, especially for people of Jakarta that have a poor eating diet. This study was conducted to identify the factors that influence the habit of eating healthy foods using an extended model of Theory of Planned behavior (TPB) by adding the factors of Health Consciousness and Knowledge of Healthy Food. Analysis of the mediation and moderation effect of the factors was carried out using Structural Equation Modeling (SEM). After gaining the result from&nbsp;the analysis, this study will create a strategy based on it and prioritized them using the Relationship&nbsp;Matrix.</p> 2023-01-29T00:00:00+07:00 Copyright (c) 2023 Jurnal Sistem Teknik Industri Business Strategy Formulation : A Literature Review 2022-10-04T16:42:52+07:00 Risdarwanto Harmein Nasution Sugiharto Pujangkoro <p>Strategy is a series of actions that are formulated to achieve long-term goals by involving resources to achieve competitive advantage. Strategy formulation to develop the business must be adjusted to the wishes of consumers to achieve competitive advantage. Business strategy focuses on growth and profitability by providing a framework for functional and operational strategies in terms of which products should be developed, how they should be priced and distributed, as well as which market segments should be targeted. The strategy formulation is determined in three steps consisting of: input step, matching step and decision-making step. The input step focuses for analyzing Company’s Internal and External Factor. The matching step focuses for determining strategies based on Company’s Internal and External Factor by using SWOT, SPACE and BCG Matrix. Decision step focuses for determining the best strategy using the Quantitave Strategic Planning Matrix (QSPM). This paper aims to review several studies that use formulation strategy methods in making the best decisions for companies. Without being based on a formulation strategy, it is very difficult for companies in making the best decisions to achieve competitive advantage</p> 2023-01-28T00:00:00+07:00 Copyright (c) 2023 Jurnal Sistem Teknik Industri Line Balancing Analysis to Optimize Production line of Bushing Rubber Using Theory of Constraints and Heuristics Method with Promodel Simulation at PT. Madya Putera Tehnik 2022-11-30T17:27:58+07:00 Andrian Septiadi Ririn Regiana Dwi Satya Elfitria Wiratmani <p>The development of manufacturing industry is currently experiencing very rapid development, although the Covid-19 pandemic is still ongoing, this development cannot be inhibited. PT. Madya Putera Tehnik is an industry-engaged automotive part manufacturer that produces bushings. The problem experienced is that the high demand for bushing rubber products makes companies have to optimize the performance of employees and their machines so that targets can be met on time. This study aims to analyze the effectiveness of the production line in the process of making rubber bushings as well as to provide suggestions regarding the balance of the track to increase productivity by using the Theory of Constraints and Heuristic methods. The Theory of Constraints method aims to identify bottlenecks at the outer pipe cutting, rubber roll, rubber clean, and packing work stations that are experiencing problems, and the Heuristic method aims to calculate the balance of the production line. The results obtained from data processing, namely the ranked positional weight and largest candidate rules method have the same results with the number of work stations as many as 14 work stations, track the efficiency of 70%, balance delay of 30%, smoothing index of 66.57, and total exits as many as 1145 units of rubber bushings. It can be interpreted that the two methods have proposed the most optimal trajectory conditions. The company should review the balance of the track and the current production capacity of the company.</p> 2023-01-28T00:00:00+07:00 Copyright (c) 2023 Jurnal Sistem Teknik Industri Comparative Analysis of Seller's Preferences in Selling Online in Marketplaces 2023-01-28T10:25:52+07:00 Arinda Soraya Putri Muklis Setiono <p>In Indonesia, the growth of internet commerce (e-commerce) tendencies has nearly doubled since the Covid-19 pandemic. The changes that have taken place have created a pattern where individuals are switching from traditional to internet buying. Both Shopee and Tokopedia provide business actors numerous options to boost sales, but each e-commerce has advantages and disadvantages specific to the services offered to business actors in e-commerce. This study compares Shopee and Tokopedia sellers' perceptions of their experiences to see if there are any discrepancies. In order to collect data, preference and comparison problem-related questionnaires were sent. Shopee excels in the people variable, while Tokopedia excels in the product, price, site, promotion, physical facilities, and process factors, according to the average perceived value of each variable. Overall, Tokopedia outperforms Shopee in terms of the services it offers to merchants. The findings of this study can be utilized to assess the issues that arise from comparison studies in order to better the research subject.</p> 2023-01-28T00:00:00+07:00 Copyright (c) 2023 Jurnal Sistem Teknik Industri Evaluation of Online Learning Satisfaction During Pandemic Using the IPA-Kano Method 2022-12-26T14:29:45+07:00 Ismianti Ismianti Hasan Mastrisiswadi Astrid Wahyu Adventari Wibowo <p>The COVID-19 pandemic has impacted all aspects of life, including teaching and learning activities. Therefore, the entire community must be ready to do online learning, which will have different processes and results from normal learning. This study aims to determine the level of student satisfaction in online learning during the pandemic. This study uses attributes on Webqual 4.0 and processed using the integration of IPA and Kano. Based on the results of research conducted on 194 respondents, it was found that attributes US1 and IT4 were in the Beginning jewelry category, IT7 attributes were in the Defenseless Strategy point category, IT2 attributes were in the Fatal category, attributes IF1, IF2, IT3 was in the Major weapon category, attributes IF4, IF5 are included in the precious treasure category, and other attributes are included in the removed category because they have the Kano Indifferent category.</p> 2023-01-31T00:00:00+07:00 Copyright (c) 2023 Jurnal Sistem Teknik Industri Analysis of Consumable Material Inventory Control in Brake System Company 2022-12-26T14:34:13+07:00 Afiqoh Akmalia Fahmi Arinda Soraya Putri Dani Setiyawan <p>A good raw material and consumables control planning system is important in the production process so that the process runs according to schedule and target. Brake system company is a manufacturing company engaged in brake systems. Concerning the control of consumable material, this company often experiences overstock in warehouses, causing an overrun in inventory costs and investment cannot develop. One of these conditions can be influenced by the ordering method applied by the company which is still not appropriate. The purpose of this study is to find out and provide proposed to companies related to the cost of consumable inventory by comparing the three methods of determining lots based on Fixed Order Quantity (FOQ), Economic Order Quantity (EOQ), and Fixed Order Quantity Proposed (FOQ Proposed) is the FOQ method combined with the Lot for Lot (LFL) principle to determine the method with the most optimal inventory cost. From the results of the study, it is known that the Proposed FOQ method has the lowest total inventory cost compared to the other two methods. The proposed FOQ approach could reduce inventory costs by up to one-third times the previous cost.</p> 2023-01-28T00:00:00+07:00 Copyright (c) 2023 Jurnal Sistem Teknik Industri Model Formulation for Estimating Oil Extraction Rate to Measure Oil Extraction Efficiency in Palm Oil Mill 2022-12-26T14:37:33+07:00 M Hudori Isdaryanto Iskandar Djoko Setyanto <p>FFB that has high HQE and FCI will determine the OER that will be obtained at POM, so that OER can be estimated using HQE and FCI, ie by calculating the oil content in FFB and the potential for oil loss in loose fruit that is not collected in the plantation area. The purpose of this study was to formulate an OER estimation model to determine the processing efficiency of POM. This research is a qualitative and quantitative analysis research, which is a scientific study to formulate an OER estimation model based on HQE and FCI parameters which will be used as the dependent variable. Based on the results and discussion it can be concluded that OER, which is a parameter of oil palm processing performance at POM, can be estimated using a model formulation developed from HQE and FCI variables, where these variables are indicators of FFB harvesting performance in oil palm plantations.</p> 2023-01-28T00:00:00+07:00 Copyright (c) 2023 Jurnal Sistem Teknik Industri