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Jurnal Sistem Teknik Industri
Published by Universitas Sumatera Utara
ISSN : 14115247     EISSN : 25279408     DOI : -
Core Subject : Science, Engineering,
Control & Systems Engineering Decision Sciences, Operations Research & Management Engineering Industrial & Manufacturing Engineering
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 21 volumes, each of which is published by TALENTA Publisher twice a year . Each volume has two publishing numbers, namely January issue numbers and July issue numbers.
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Articles 222 Documents
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Analysis of Production Line Balance with Helgeson Birnie Approach on Plastic Chopping Machine Khatami, Muhammad; Ginting, Rosnani; Ishak, Aulia
Jurnal Sistem Teknik Industri Vol. 25 No. 1 (2023): JSTI Volume 25 Number 1 January 2023
Publisher : TALENTA Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jsti.v25i1.9288

Abstract

The purpose of track balance is to find out the constraints that cause the work station to be unbalanced. Research on plastic chopping tool products, where the production of plastic chopping tools takes too long in the process of making one product. line balancing is the process of balancing the production line, especially in the assembly production process. The balance of this path is intended to reduce excessive workload on one work station and strive so that each work station on each path has the same load. It is intended that each work station has a more efficient work cycle time and can avoid operator errors in assembly. to minimize the number of stations for a given cycle time. The problem of unbalanced production lines and differences in large station times causes an imbalance in the production floor. Balancing the lines on the production floor will affect the achievement of predetermined production targets. The Helgeson-Birnie method is one of the track balance methods that can solve problems in track balance. In the Ranked Position Weight results there are 6 work stations, the efficiency value is 90.02%, the balance delay is 9.97% and the Smoothing Index is 628,204
The Implementation Of Machine Learning In Demand Forecasting : A Review Of Method Used In Demand Forecasting With Machine Learning Dalimunthe, Sri Baginda; Ginting, Rosnani; Sinulingga, Sukaria
Jurnal Sistem Teknik Industri Vol. 25 No. 1 (2023): JSTI Volume 25 Number 1 January 2023
Publisher : TALENTA Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jsti.v25i1.9290

Abstract

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.
Implementation of Macro Ergonomic Participatory In Physical Work Environment: A Literature Review Candra, Muhammad; Ginting, Rosnani; Nurul Huda, Listiani
Jurnal Sistem Teknik Industri Vol. 25 No. 1 (2023): JSTI Volume 25 Number 1 January 2023
Publisher : TALENTA Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jsti.v25i1.9294

Abstract

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.
Strategy Planning Based on Factors Affecting Behavior of Healthy Food Consumption Vanya Permata Azzura; Muslim, Erlinda
Jurnal Sistem Teknik Industri Vol. 25 No. 1 (2023): JSTI Volume 25 Number 1 January 2023
Publisher : TALENTA Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jsti.v25i1.9433

Abstract

Healthy food is a basic human need that needs 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 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 not contagious but has 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 the analysis, this study will create a strategy based on it and prioritized them using the Relationship Matrix.
Business Strategy Formulation : A Literature Review Risdarwanto; Nasution, Harmein; Pujangkoro, Sugiharto
Jurnal Sistem Teknik Industri Vol. 25 No. 1 (2023): JSTI Volume 25 Number 1 January 2023
Publisher : TALENTA Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jsti.v25i1.9459

Abstract

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
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 Septiadi, Andrian; Dwi Satya, Ririn Regiana; Wiratmani, Elfitria
Jurnal Sistem Teknik Industri Vol. 25 No. 1 (2023): JSTI Volume 25 Number 1 January 2023
Publisher : TALENTA Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jsti.v25i1.9519

Abstract

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.
Evaluation of Online Learning Satisfaction During Pandemic Using the IPA-Kano Method Ismianti, Ismianti; Mastrisiswadi , Hasan; Wahyu Adventari Wibowo, Astrid
Jurnal Sistem Teknik Industri Vol. 25 No. 1 (2023): JSTI Volume 25 Number 1 January 2023
Publisher : TALENTA Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jsti.v25i1.10535

Abstract

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.
Analysis of Consumable Material Inventory Control in Brake System Company Fahmi, Afiqoh Akmalia; Soraya Putri, Arinda; Setiyawan, Dani
Jurnal Sistem Teknik Industri Vol. 25 No. 1 (2023): JSTI Volume 25 Number 1 January 2023
Publisher : TALENTA Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jsti.v25i1.10565

Abstract

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.
Model Formulation for Estimating Oil Extraction Rate to Measure Oil Extraction Efficiency in Palm Oil Mill M Hudori; Iskandar, Isdaryanto; Setyanto, Djoko
Jurnal Sistem Teknik Industri Vol. 25 No. 1 (2023): JSTI Volume 25 Number 1 January 2023
Publisher : TALENTA Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jsti.v25i1.10596

Abstract

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.
Comparative Analysis of Seller's Preferences in Selling Online in Marketplaces Putri, Arinda Soraya; Setiono, Muklis
Jurnal Sistem Teknik Industri Vol. 25 No. 1 (2023): JSTI Volume 25 Number 1 January 2023
Publisher : TALENTA Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jsti.v25i1.11209

Abstract

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.

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