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Yusuf Priyandari
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INDONESIA
PERFORMA : Media Ilmiah Teknik Industri
Published by Universitas Sebelas Maret
ISSN : 14128624     EISSN : 26206412     DOI : https://doi.org/10.20961/performa
Core Subject :
Performa: Media Ilmiah Teknik Industri is a journal in the field of Industrial Engineering and Management with its scopes consisting of Manufacturing System and Technology, Operational Research, Product Design and Development, Ergonomic and Work System Design, Supply Chain and Business Management, Quality and Reliability Engineering, Information System and Knowledge Management, Data Analytics, and Robotics and Industrial Automation. This journal publishes original research articles, reviews, and special features on cutting-edge industrial engineering and manufacturing management.
Arjuna Subject : -
Articles 22 Documents
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Development of a Software Usage Loyalty Model by Analysing the Causal Relationships between Software Quality, Customer Satisfaction, Trust, and Experience in the Access by KAI Application Angela Regine Mutiaraputi; Eko Pujiyanto; Yusuf Priyandari
Performa: Media Ilmiah Teknik Industri Vol. 24 No. 2 (2025): Performa: Media Ilmiah Teknik Industri
Publisher : Industrial Engineering Study Program, Faculty of Engineering, Universitas Sebelas Maret (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/performa.v24i2.2687

Abstract

Trains are a popular mode of long-distance transportation in Indonesia due to their advantages in travel time, comfort, and safety. In 2023, train passengers increased by 40.6% to 270 million people, with most tickets booked through mobile applications. PT Kereta Api Indonesia (KAI) offers online ticket booking services through the Access by KAI application, which, despite its increased usage, has received many negative reviews regarding its performance on the Google Play Store. This research aims to develop a model of software usage loyalty using nine software quality variables from ISO/IEC 25010:2023 product quality and the PLS-SEM (Partial Least Squares-Structural Equation Modelling) method to analyse the causal relationships between software quality, customer satisfaction, trust, experience, and loyalty. The results show that functional suitability and safety have a significant positive indirect effect on customer loyalty through customer satisfaction. Additionally, functional suitability, safety, customer trust, and customer experience have a significant positive direct effect on customer satisfaction, while customer trust and customer satisfaction have a significant positive direct effect on customer loyalty. Based on these findings, priority suggestions were developed to improve the Access by KAI application.
Optimising Profits Using the Two-Phase Method and Sensitivity Analysis of UMKM Kedai Ibu Faryz Reynaldy; Winarno; Maria Angela Putri Setyawati; Deviana Nauli Bernadeta
Performa: Media Ilmiah Teknik Industri Vol. 24 No. 2 (2025): Performa: Media Ilmiah Teknik Industri
Publisher : Industrial Engineering Study Program, Faculty of Engineering, Universitas Sebelas Maret (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/performa.v24i2.2736

Abstract

Kedai Ibu is a Micro, Small, and Medium Enterprise (MSME) engaged in home cooking. Business operations run by Kedai Ibu face challenges in determining production optimisation to maximise profits with limited resources, such as raw materials and production time. Optimisation problems often involve two main objectives, namely maximising profits or minimising costs. The research method employed is the two-phase method, with sensitivity analysis conducted through manual calculation and assisted by Lingo software. The purpose of this research is to describe and analyse the implementation of linear programming using the two-phase method to achieve maximum production profit. The research results indicate that the profit obtained is IDR 1,157,000, achieved by producing 250 portions of Ayam Geprek and 50 portions of Ayam Bakar for each order of 300 chicken portions.
Optimising Inventory Control in Pharmaceutical Distribution: A Case Study on PT. XYZ Nia Arfina Foci; Ahmad Syarfuddin Indrapriyatna
Performa: Media Ilmiah Teknik Industri Vol. 24 No. 2 (2025): Performa: Media Ilmiah Teknik Industri
Publisher : Industrial Engineering Study Program, Faculty of Engineering, Universitas Sebelas Maret (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/performa.v24i2.2737

Abstract

Inventory control is a policy designed to manage and regulate the supply, storage, and accessibility of items in an organisation. Its primary purpose is to ensure that there is always enough stock on hand to meet demand while minimising the costs associated with holding and maintaining inventory. XYZ, a pharmaceutical distributor, faces challenges in optimising its inventory control policy, resulting in frequent stockouts, overstocks, and product damage during distribution. This study aims to design an optimised inventory control policy to enhance the Company's drug inventory system performance. The research begins by classifying inventory items using the ABC method and calculating the inventory turnover ratio (TOR). A scatter diagram is then constructed based on historical demand data to identify product demand patterns. Subsequently, three forecasting methods are applied, and the most accurate method is selected based on the Mean Absolute Percentage Error (MAPE). Inventory issues are categorised, with Class A drugs managed using the Q model and Classes B and C using the P model. The Hadley-Within method with backorder is employed for inventory problem-solving. The proposed inventory policy results in a total inventory cost of IDR 339,221,858 and a TOR of 4.26. In contrast, the existing system incurs a total inventory cost of IDR 1,338,286,901 with a TOR of 8.7. Implementing the optimised policy would lead to a cost reduction of 74.65%, equating to IDR 999,065,044, and improved inventory efficiency. This study provides a practical approach for pharmaceutical distributors to enhance inventory management, reduce costs, and optimise supply chain performance.
Identification Variables that Influence Attitudes and Intention in Buying Green Products as Recommendations in the Green Manufacturing Industry Nurhadistya Alyfakhry; Andreas Mahendro Kuncoro
Performa: Media Ilmiah Teknik Industri Vol. 24 No. 2 (2025): Performa: Media Ilmiah Teknik Industri
Publisher : Industrial Engineering Study Program, Faculty of Engineering, Universitas Sebelas Maret (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/performa.v24i2.2738

Abstract

Understanding consumer behavior regarding attitudes and intention in using green products is an important thing for producers to develop more targeted and efficient marketing strategies that suit consumer needs and desires, so that they can increase sales of green products produced by companies in the green manufacturing industry and increase the competitiveness of green products in the market. This research aims to identify the variables influencing consumers' attitudes and purchasing interest towards green products. The results will then be used to recommend which variables companies should prioritize in producing environmentally friendly products. This research employed purposive sampling as its sampling technique, along with a questionnaire survey targeting consumers who use green products in the DIY area. For data processing, the research employed the Structural Equation Model-Partial Least Squares (SEM-PLS) method using the SmartPLS 4 tool, and the results showed support for the attitude-behavior context theory. Environmental awareness, perceptions of green products, and perceptions of eco-innovation are factors that influence attitudes toward green products, which in turn encourage consumer interest in purchasing green products. These results have implications for company management, suggesting that companies should undertake product certification to ensure safety, promote environmentally friendly products, and adopt innovations in green products.
Workload Analysis of Subdivision Utility Engineering 2 Technicians at PT Konimex Using Full-Time Equivalent Febrian Naufal Irfansyah; Fakhrina Fahma
Performa: Media Ilmiah Teknik Industri Vol. 24 No. 2 (2025): Performa: Media Ilmiah Teknik Industri
Publisher : Industrial Engineering Study Program, Faculty of Engineering, Universitas Sebelas Maret (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/performa.v24i2.2740

Abstract

Rapid technological advancement significantly impacts various aspects of life, including company productivity. Company productivity is closely related to human resources. A crucial aspect of human resources in enhancing company productivity is the workload received by employees. PT Konimex is a company planning to implement a new corporate strategy to face Industry 4.0 globalization, which requires evaluating human resources. This study aims to analyze the workload of technicians in the Utility Engineering 2 sub-department at PT Konimex using the Full Time Equivalent (FTE) method and to provide improvement recommendations to optimize workload. Full-time Time Equivalent (FTE) is used to calculate the amount of time required by workers to complete activities within a specific period. To calculate FTE, employee activity and time usage data are required. Therefore, data collection is conducted by compiling the company's historical records and conducting interviews with technicians. After performing calculations, a fishbone diagram is used to analyze the problem and identify alternative solutions. The results show significant variations in FTE values among technicians. Technician Officer A, Technician Level 1 A, and Technician Level 1 B are in an overload condition, Technician Officer B, Technician Level 4 B, and the Head Technician are underloaded. At the same time, Technician Level 1 C and Technician Level 4 A have a normal workload. Improvement recommendations include scheduling preventive maintenance work, optimizing overtime only for critical situations, adhering to work distribution procedures according to SOPs, developing work report input templates, and evaluating preventive maintenance activities
Implementation of Taguchi Method in Optimizing Virgin Coconut Oil Extraction by Cooling and Centrifugation Techniques Marulan Andivas; Alex Kisanjani; Wahyu Ismail Kurnia; Novia Febryantri
Performa: Media Ilmiah Teknik Industri Vol. 24 No. 2 (2025): Performa: Media Ilmiah Teknik Industri
Publisher : Industrial Engineering Study Program, Faculty of Engineering, Universitas Sebelas Maret (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/performa.v24i2.2741

Abstract

Virgin Coconut Oil (VCO) extraction through refrigeration and centrifugation techniques has become the preferred extraction technique due to its ability to maintain oil quality. However, optimization of extraction yield and quality remains a challenge. Therefore, this study aims to identify the optimal factors in VCO extraction, focusing on yield and physicochemical quality, through the application of the Taguchi method. The factors tested included centrifugation speed, centrifugation time, storage temperature, and storage duration, each with three levels, using an orthogonal array L9(3^4). In addition, analysis of variance (ANOVA) was used to investigate the effects and contributions of each aspect. The experimental results indicated that centrifugation speed and storage temperature had significant effects on VCO yield, while centrifugation time and storage duration had minimal effects. Analysis of Variance (ANOVA) confirmed that centrifugation speed contributed 88.31% and storage temperature 7.68% to the yield. For the quality parameters of VCO content, such as moisture content, free fatty acids, total acid number, and peroxide value, no factor significantly affected the quality of VCO, indicating that this method is effective in maintaining quality under various conditions. These findings suggest that optimization of centrifugation speed and storage temperature can increase VCO yield without compromising quality. This research contributes to providing practical insights for efficient and high-quality VCO production, in accordance with the Indonesian National Standard (SNI 7381:2022) for VCO quality. Furthermore, VCO producers, including micro and small scale businesses, can produce large scale and consistent VCO without having to reduce product quality by optimizing centrifugation speed and storage temperature during the VCO manufacturing process.
Cleaner Production in the Marble Industry (Case Study: UD Warna Utama) Funny Gustanty Aryndhy; Bambang Suhardi; Rahmaniyah Dwi Astuti
Performa: Media Ilmiah Teknik Industri Vol. 24 No. 2 (2025): Performa: Media Ilmiah Teknik Industri
Publisher : Industrial Engineering Study Program, Faculty of Engineering, Universitas Sebelas Maret (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/performa.v24i2.2743

Abstract

UD Warna Utama is one of the marble stone industries located in Tulungagung, East Java. In the marble stone process, there are three stages of production, namely the sawing of marble blocks, the sawing of marble slabs, and the polishing of marble. In the production process, the waste generated is sometimes sold as building foundation material, while other residues are directly disposed of into the surrounding environment of the factory, causing environmental pollution. This research aims to identify opportunities for improving efficiency and reducing environmental impact, as well as providing alternative proposals to minimize and utilize the waste generated in accordance with the concept of clean production. A quick analysis of the material flow using the Quick Scan method and interviews yielded several options for implementing clean production, namely the Recycle and Reuse methods. The proposed alternatives were evaluated using the B/C Ratio and Payback Period feasibility analysis, resulting in viable proposals for implementation, including the creation of water retention systems for block stone sawing processes, selling sludge waste as construction material, making mosaics, and producing terrazzo.
Application of Lean Six Sigma, FMEA and Fuzzy to Improve Garment Product Quality (Case Study: Jhono Garment, West Jakarta) Muhammad Anjar; Bramantiyo Eko Putro
Performa: Media Ilmiah Teknik Industri Vol. 24 No. 2 (2025): Performa: Media Ilmiah Teknik Industri
Publisher : Industrial Engineering Study Program, Faculty of Engineering, Universitas Sebelas Maret (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/performa.v24i2.2744

Abstract

Jhono Garment produces various kinds of clothing including t-shirts, polo, nightwear, children's clothes, sportswear, and others with a made by order system. The problem that is often experienced by this Garment is that there are still defects or defects in the product in the production process that cause cost and time losses. This study aims to determine the level of defects and sigma values of products produced by Jhono Garment, find out what waste factors must be eliminated first, find out the factors that cause product defects in Jhono Garment, provide recommendations for improvements to the causes of defects in Jhono Garment products. Data collection in this study is using primary and secondary data, namely production data from November 2022 to April 2023 and production process data. The methods used are lean six sigma, FMEA and fuzzy. The results showed that the sigma value of the Jhono Garment product is a T-shirt clothing product with a sigma value of 4.006. The waste factor that must be eliminated first is waste defects. The factors causing defects in Jhono Garment consist of 5 factors, namely humans, machines, materials, methods, and the environment. The recommendation for improvement of waste defects is to make folding molds in the product folding process.
Determining Packaging Elements by Kansei Engineering Approach of Salt Bread Products Novi Purnama Sari; Ardy Surya Wijayanto; Novia Andri Yanti; Thalia Salsabila
Performa: Media Ilmiah Teknik Industri Vol. 24 No. 2 (2025): Performa: Media Ilmiah Teknik Industri
Publisher : Industrial Engineering Study Program, Faculty of Engineering, Universitas Sebelas Maret (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/performa.v24i2.2745

Abstract

Packaging has a crucial role in a product and is an important aspect in attracting consumer attention to buy a product. Packaging design elements serve as a key visual medium to describe product characteristics. Salt Bread products have not optimized the design elements in their packaging, so packaging development is needed. This research aims to determine design elements based on consumer preferences. This research uses the Kansei Engineering method to obtain design elements that align with the design concept that has been generated. Utilizing of the QTT1 method to produce packaging design elements for Salt Bread products. Determination of design elements is done by distributing Likert questionnaires to assess the suitability of the design concept with 53 packaging samples. The resulting design concept, namely “Minimalist-Attractive”. The results of running QTT1 data with R software obtained design elements, namely art carton material (X1.2), medium size (X2.2), square cube shape (X3.4), interlocking lid (X4.6), window and tray features (X5.6), classic elegant design style (X6.8), and direct printing and paper indirect printing techniques (X7.3). The resulting elements on the Salt Bread packaging are in line with the packaging design concept according to consumer preferences.
Implementation of Kaizen in Various Industries: A Systematic Literature Review Rustam Sihombing; Suhaeri; Sarjono; Humiras Hardi Purba
Performa: Media Ilmiah Teknik Industri Vol. 24 No. 2 (2025): Performa: Media Ilmiah Teknik Industri
Publisher : Industrial Engineering Study Program, Faculty of Engineering, Universitas Sebelas Maret (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/performa.v24i2.2746

Abstract

Kaizen is a strategic approach that focuses on continuous improvement to increase an organization's efficiency, quality, and productivity. This article explores the implementation of Kaizen in various sectors through a literature review of 45 articles published between 1996 and 2024. This research aims to identify the application, benefits, and challenges of Kaizen in various industries, both manufacturing and services. The results of the review show that Kaizen has been successfully applied in various sectors, especially manufacturing (31 articles), with a focus on methods such as 5S, Kanban, and the PDCA cycle to reduce waste and increase productivity. Additionally, the application of Kaizen has expanded to non-manufacturing sectors, such as healthcare, education, and the public sector, where this approach contributes to operational efficiency and improved services. However, challenges such as resistance to change, limited resources, and lack of management support often become obstacles to implementation. This study provides recommendations for the development of a more strategic and adaptive Kaizen approach in the modern business environment as a relevant and effective management tool in various industrial contexts.

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