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All Journal Jurnal Sains dan Teknologi Greenation International Journal of Engineering Science Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit
Wawan Budi Setyawan
Politeknik ATK Yogyakarta, Daerah Istimewa Yogyakarta, Indonesia
Aerospace Engineering Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Electrical & Electronics Engineering Energy Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Mechanical Engineering

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Analisis Kekuatan Material Hasil Teknologi Fused Deposition Modelling Sebagai Material Alternatif Shoelast Oktavian, Dicky; Prihadianto, Braam Delfian; Setyawan, Wawan Budi; Frannita, Eka Legya
Jurnal Sains dan Teknologi (JSIT) Vol. 5 No. 3 (2025): September-Desember
Publisher : CV. Information Technology Training Center - Indonesia (ITTC)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47233/jsit.v5i3.3411

Abstract

Pada industri alas kaki penggunaan shoelast merupakan aspek penting dalam proses manufaktur alas kaki. Dalam produksiMass, shoelast materials are generally made of wood, metal, or plastic which requires complex and high-costmanufacturing processes. For limited production needs, prototypes, or custom made materials require quite high costs andlong manufacturing process time. For limited production needs, alternative materials are needed that can be used asshoelast materials. This study aims to analyze the mechanical strength of the material produced by Fused DepositionModelling (FDM) technology as an alternative to shoelast making materials that are more flexible and efficient. The typesof materials used in this study are Polylactic Acid (PLA), Acrylonitrile Butadiene Styrene (ABS), and PolyethyleneTerephthalate Glycol (PETG). The three types of thermoplastic materials were printed with fill density variationparameters using a 3d printer and pressed testing was carried out. The data were analyzed by calculating the average valueand standard deviation of the compressive strength. The results showed that all materials have a compressive strengthhigher than 5 MPa, thus meeting the basic mechanical requirements as a shoelast material. Furthermore, PLA material hasthe characteristics that are suitable for making precise shoelast prototypes, but it is not suitable for repetitive lastingprocesses. While ABS material is more relevant for repetitive lasting processes and PETG material is relevant for limitedproduction but still requires durability
THE APPLICATION OF ARTIFICIAL INTELLIGENCE FOR DESIGNING BATIK MOTIF Eka Legya Frannita; Anwar Hidayat; Wawan Budi Setyawan
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol. 23 No. 1 (2024): Berkala Penelitian Kulit, Sepatu, dan Produk Kulit
Publisher : Politek ATK Yogyakarta Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58533/pbjqxv39

Abstract

Artificial intelligence was a popular technology that was successfully utilized in several fields including of fashion industry. Recently, several research communities have been done in employing artificial intelligence for increasing the productivity. This research work aims to create batik pattern using artificial intelligence which was conducted in three major processes. The three processes were brainstorming process, designing process, and validation. Brainstorming process aimed to determine the restriction of this research work. Designing process focused on the utilization of artificial intelligence for creating batik pattern. In this process, we used online illustration maker based artificial intelligence. Validation process aimed to evaluate the originality of result. According to evaluation process using Google Lens, it can be concluded that the resulted design was original in which there is another batik patterns that similar to our result.
THE DEVELOPMENT OF SENTIMENT ANALYSIS APPROACH FOR IDENTIFYING CUSTOMER INTEREST IN LEATHER BAG Eka Legya Frannita; Anwar Hidayat; Wawan Budi Setyawan
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol. 23 No. 1 (2024): Berkala Penelitian Kulit, Sepatu, dan Produk Kulit
Publisher : Politek ATK Yogyakarta Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58533/kea1td34

Abstract

Analyzing user interest has become one of the most popular research topics since identifying the user satisfaction played the essential role to prevent the company profit. This research work aimed to apply sentiment analysis approach for identifying the user interest in leather bag. This research was extremely beneficial to determine the satisfaction of leather bag customers. This research work was done by employing four stages. In the first process, we conducted brainstorming process for determining the exclusion and inclusion of research. In the next process, we collected the data by conducting crawling process from social media review. After collecting the data, we conducted data analysis process by labelling each review into three labels, which were positive sentiment, neutral sentiment and negative sentiment. In the last process, we visualized the result and we summarized the result. The visualization process illustrated that positive sentiment achieved percentage of 28%, neutral sentiment achieved percentage of 69% and negative sentiment achieved percentage of 3%. This result indicates that markets are neutral or not interest enough in leather bag. The analysis process also concluded that News obtained the highest total mentions indicating that Batik is not regularly mention in popular social media. According to those results, innovation or creativity about Batik is should be regularly generated in order to increase the market interest.
DEVELOPMENT OF STANDARD OPERATING PROCEDURES FOR WALKING FOOT SEWING MACHINE NEEDLE REPLACEMENT BASED ON THE DECLINE OF STITCH QUALITY IN LEATHER PRODUCT MANUFACTURING AT SMALL AND MEDIUM INDUSTRY Wawan Budi Setyawan
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol. 25 No. 1 (2026): Berkala Penelitian Kulit, Sepatu, dan Produk Kulit
Publisher : Politek ATK Yogyakarta Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58533/5tz5ef08

Abstract

Leather product manufacturing in Small and Medium Enterprises (SMEs) still relies heavily on operator experience in determining the replacement interval of sewing machine needles. Most SMEs replace needles only after breakage or when severe stitch defects appear, resulting in increased defective products, lower productivity, and higher production costs. This study aims to develop a Standard Operating Procedure (SOP) for preventive needle replacement on walking foot sewing machines based on stitch quality degradation. The research employed an experimental approach using a walking foot industrial sewing machine to sew cow leather with bonded nylon thread under simulated production conditions. Needle operating time was varied at 0, 8, 16, 24, and 32 hours. Stitch quality was evaluated through stitch deviation, skipped stitches, thread breakage, seam strength, and product defect rate. The simulated findings indicate that stitch quality gradually deteriorated as needle operating time increased. Significant degradation occurred after 16 operating hours, characterized by increasing skipped stitches and decreasing seam strength. Based on these findings, an SOP recommending preventive needle replacement every 16 operating hours was developed to maintain production quality and reduce defects in leather manufacturing SMEs. The proposed SOP is expected to improve product consistency, production efficiency, and maintenance practices.
Comparative Analysis of Shoe Size Standards Based on Foot Measurement Methods: Evidence from Indonesian and International Standards Wawan Budi Setyawan; Nurwantoro; Muhammad Asfan; Risang Pujianto; Totok Yulaidin
Greenation International Journal of Engineering Science Vol. 4 No. 2 (2026): (GIJES) Greenation International Journal of Engineering Science (June - August
Publisher : Greenation Research

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.38035/gijes.v4i2.1288

Abstract

The footwear industry is one of the strategic manufacturing sectors that contributes significantly to economic growth through employment, value creation, and export activities. Accurate shoe sizing is essential to ensure consumer comfort, product quality, and international market competitiveness. This study aimed to compare the Indonesian National Standard (SNI) shoe sizing system with major international sizing systems based on foot measurement methods, evaluate the regulatory implications of SNI implementation, and propose a harmonized sizing framework for the footwear industry. A descriptive comparative approach was employed through literature review, document analysis of national and international standards, comparative evaluation of shoe sizing systems, observation of foot measurement methods, and regulatory analysis. The results indicate that the SNI sizing system has a high level of compatibility with the Mondopoint system because both are based on actual foot length measured in millimeters. In contrast, the European Union, United Kingdom, and United States sizing systems use different numbering principles that require conversion. A Mondopoint-based dual-labeling approach is proposed to improve sizing accuracy, reduce product returns, facilitate international trade, and strengthen the competitiveness of Indonesian footwear products. These findings provide practical support for future footwear standardization policies and industrial implementation.
Co-Authors Anwar Hidayat Eka Legya Frannita Muhammad Asfan Nurwantoro Nurwantoro Oktavian, Dicky Prihadianto, Braam Delfian Risang Pujianto Totok Yulaidin