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Vol. 5 No. 2 (2025): September-March 2025
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Indonesia (120)
Nigeria (4)
India (1)
Published:
2025-08-22
Articles
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Analysis of Bread Production Quality at SMEs Industry using Statistical Process Control (SPC)
Tessa Zulenia Fitri, Rama Dani Eka Putra, Nia Arfina Foci, Muhamad Yasin, Muhammad Arif MunandaShow Abstract | Download PDF | DOI: 10.31004/jestm.v5i2.281 | Check in Google Scholar
XYZ Industry is a micro-enterprise engaged in bread production. However, defects such as burnt bread, irregular shapes, and inconsistent weights are still frequently found during production, which affects customer satisfaction and production efficiency. This study aims to analyze and optimize bread production quality using the Statistical Process Control (SPC) approach. The methodology includes data collection over 20 production days, analysis using Pareto diagrams, p control charts, and R charts, and cause and effect diagrams. The findings indicate an average defect rate of 4.79%, with burnt bread being the most prevalent defect (30%). The p control chart identified several days with assignable variation, while the and R charts revealed that the bread weight process was statistically in control. The main causes of defects were related to human factors, machine limitations, and the absence of standardized procedures. Recommendations include establishing standard operating procedures (SOPs), conducting operator training, and procuring supporting tools. The consistent application of SPC is expected to enhance both the quality and efficiency of production
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Optimization of Wood Waste Utilization for Sustainable Material Processing in the Furniture Industry
Anshah Silmi Afifah, Alfani Risman Nugroho, Nurmadina Nurmadina, Taufik Ramadhan Fitriyanto, Dhian JuwitasariShow Abstract | Download PDF | DOI: 10.31004/jestm.v5i2.266 | Check in Google Scholar
This study aims to identify and quantify wood waste produced during the machining of solid wood components using kiln dried Durio zibethinus boards. A descriptive quantitative approach was employed to measure the volume and weight of waste generated at each production stage, including ripping, crosscutting, planing, and thicknessing. Sampling was conducted using a precision digital scale to collect and compare the actual and theoretical waste. The results indicate that only 43% of the raw material volume was utilized in finished components, while 57% was lost as waste, primarily in the form of sawdust, shavings, and offcuts. The thicknesser contributed the largest proportion of waste (58%), followed by the ripsaw (21%), single planer (20%), and jumpsaw (1%). These findings highlight the need for improved raw material selection, more efficient cutting list design, enhanced nesting strategies, and better machine calibration. Implementing these practices can reduce wood waste, improve material efficiency, and minimize occupational exposure to wood dust in furniture manufacturing
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The Influence of Social Media on Adolescent Attitudes at State Senior High School 10 Pekanbaru
Ahmad Redho, Meliza Meliza, Rifa YantiShow Abstract | Download PDF | DOI: 10.31004/jestm.v5i2.294 | Check in Google Scholar
Adolescence is a phase between childhood and Adulthood between the ages of 10 and 19. Social network usage in Indonesia reaches 3 hours and 18 minutes a day. That period is the best in the world. Excessive use of social media can affect many factors, one of which is the attitude of adolescents. This study aims to determine the impact of social media on Adolescent Attitudes at SMA Negeri 10 Pekanbaru. Used in this type of research a quantitative method with a correlational Research Approach using online questionnaire distribution through G-From samples This study uses the slovin method obtained a sample of 263 Selecting people and samples technique used stratified Random sample, and statistical testing using the Chi-square test. The results of the study were shown that the majority Social Network use was high, amounting to 141 (53.6) respondents, the majority of attitudes tended to be negative, namely 167 (63.5%) based on the results of the Chi-Square test The Influence of social media on Adolescent Attitudes at SMA Negeri 10 Pekanbaru obtained P-Value <0.05 (0.000). It can be concluded that social networks have an impact on the Attitudes of Adolescents at SMA Negeri 10 Pekanbaru. It is expected that the teaching staff at SMA Negeri 10 Pekanbaru can control and provide understanding to students not to use social media excessively
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Analysis of the Influence of Work Discipline, Work Environment, Leadership and Job Satisfaction on Performance
Lingga Ramadhana Arfi, Suryatunnisak Suryatunnisak, Leonardus Teguh HandoyoShow Abstract | Download PDF | DOI: 10.31004/jestm.v5i2.328 | Check in Google Scholar
This study is a quantitative study that aims to determine the effect of work discipline, work environment, leadership and job satisfaction on performance. The population used in this study was all 50 employees of Toptel Hotel Pekanbaru. The research sample was determined using a census sampling technique, which involves taking the entire population as the sample. Therefore, the sample size in this study was 50 employees. The data analysis technique used was quantitative analysis using multiple linear regression with the help of the Statistical Package for the Social Sciences (SPSS) program. The results of the study are as follows: 1) Work discipline has a positive and significant effect on performance. 2) The work environment has a positive and significant effect on performance. 3) Leadership has a positive and significant effect on performance. 4) Job satisfaction has a positive and significant effect on performance. 5) Together or simultaneously, work discipline, work environment, leadership, and job satisfaction have a positive and significant effect on performance.
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An Eco-Futuristic Approach to Boxing Community Center Design
Andrie Herdiansyah, Gifranza Gifranza, Imbardi ImbardiShow Abstract | Download PDF | DOI: 10.31004/jestm.v5i2.343 | Check in Google Scholar
The development of urban areas demands the existence of community sports facilities that not only function as physical activity spaces, but also as a medium for shaping environmental quality and the identity of sustainable public spaces. The Boxing Community Center is characterized by high-intensity activities that produce special demands on thermal comfort, air quality, and spatial flexibility. This study aims to examine how an eco-futuristic appropriate is applied in the formation of the Boxing Community Center building mass composition and its implications for environmental performance and architectural expression. The research method used is qualitative-descriptive through literature review, analysis of sports building precedents, and exploration of design concepts. The results of the study show of that the application of fragmented, layered, and climate-adaptive mass composition can improve natural ventilation, daylighting, and the quality of the transition space between the building and the outside environment. In addition to contributing to energy efficiency, this mass composition strategy also creates a dynamic and futuristic architectural image that is in harmony with the character of boxing. This study confirms that the processing of building mass with an eco-futuristic approach plays an important role as a passive strategy as a basis for designing community sports facilities that have optimal environmental performance and long-term flexibility.
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Size and Shape Distribution of Microplastics in PET Recycled Wastewater and Their Removal Behavior during the Coagulation–Flocculation Process
Lilya Irsianti Fadlilah, Mela Ardeline, Revi LasmitaShow Abstract | Download PDF | DOI: 10.31004/jestm.v5i2.378 | Check in Google Scholar
Plastic Recycling Facilities (PRFs), although intended to reduce plastic pollution, can act as potential sources of microplastic release due to mechanical processing activities. This study aims to investigate the size and shape distribution of microplastics in polyethylene terephthalate (PET) recycling wastewater and to evaluate their removal behavior through coagulation–flocculation processes. Wastewater samples were collected from several treatment stages of the wastewater treatment system at a PET recycling facility. The results indicate that microplastics are predominantly fragment-shaped, with medium-sized particles representing the most abundant fraction. Coagulation–flocculation was shown to effectively remove microplastics, particularly fragment-shaped and medium-sized particles, compared to film and fiber forms. Removal efficiency was influenced by microplastic size and shape characteristics. These findings suggest that coagulation–flocculation has strong potential as an effective method for controlling microplastic release from PET recycling wastewater and provides a basis for developing more targeted wastewater treatment strategies.
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Designing a Web-Based Online Opinion Polling System (Case Study: Kampar Regency Transportation Agency)
Safni Marwa, Hanantatur Adeswastoto, Syawalan FinandaShow Abstract | Download PDF | DOI: 10.31004/jestm.v5i2.426 | Check in Google Scholar
This study aims to design a web-based online polling system for the Kampar Regency Transportation Agency to improve the effectiveness and efficiency of gathering community aspirations. Public opinion is a crucial foundation for policy-making, particularly in supporting the “Smart Transportation System” initiative. The study was conducted using the Prototyping development model, which includes requirement gathering, quick design, and iterative evaluation. Data collection involved literature reviews, obersrvations, and interviews with agency officials to identify challenges such as geographical barriers and decentralized communication channels. The system was designed using Unified Modelling Language (UML), including Use Case, Activity, and Class Diagrams, to provide a structured blueprint for both the user interface and database. The results demonstrate that the transition from convetional to digital methods provides a centralized, transparent, and accessible platform for the public. The significance of this research lies in its contribution to local government digital transformation, ensuring that community feedback is systematically documented and accurately processed. This system serves as a scalable solution for enchancing public participation and supporting data driven policy evaluation in Kampar Regency.
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