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Competency Certification for Lifelong Learning and Professional Development in Technical Education: A Systematic Literature Review Sri Anggreni; Mukhlisin Mukhlisin; Luis Miguel Oliveira de Barros Cardoso
Journal of Vocational, Informatics and Computer Education Vol 4, No 1 (2026): March 2026
Publisher : Academic Bright Collaboration

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.66053/voice.v4i1.473

Abstract

Purpose – This study aims to explore and map the utilization of competency certification, including micro-credentials, as a mechanism to support lifelong learning and professional development in response to the rapidly changing world of work. It focuses on understanding how certification contributes to skills validation, employability, and career mobility in educational and workplace contexts.Methods – This study adopts a Systematic Literature Review (SLR) approach guided by the PRISMA 2020 framework. Articles were retrieved from the Scopus database (2020–2025), yielding 363 records, of which 36 studies fulfilled the predefined inclusion criteria. The methodological quality and risk of bias were assessed using the Mixed Methods Appraisal Tool (MMAT) through independent evaluation by three reviewers. The findings were systematically synthesized to identify key patterns, thematic relationships, and research gaps regarding competency certification in the context of lifelong learning and professional development.Findings – The analysis reveals that competency certification plays a significant role in supporting lifelong learning by enabling the flexible, modular, and verifiable recognition of skills. Its effectiveness is shaped by factors such as competency-based design, alignment with labor market needs, institutional readiness, and the ability to ensure verification, portability, and interoperability of the acquired competencies. Furthermore, the integration of digital technologies, such as blockchain-based credentialing, digital badge infrastructures, and AI-supported assessment systems, enhances the transparency, scalability, and cross-platform recognition of credentials, transforming certification into a dynamic learning ecosystem.Research implications – This study highlights the importance of integrating competency certification into education and workforce development systems. This suggests that stakeholders, including educational institutions, industry, and policymakers, should collaborate to ensure interoperability, standardization, and alignment with evolving labor market demands. Such integration is essential for strengthening lifelong learning ecosystems and workforce adaptability.Originality – This study conceptualizes competency certification as a socio-technical system that integrates educational practices, institutional frameworks, and digital infrastructures. It emphasizes that certification is not merely a validation tool but a technology-enabled mechanism that supports continuous learning, professional development, and adaptive workforce readiness.
Experimental study on annealing S45C steel: effect of temperature and time on hardness, impact strength Mahadir Sirman; Syahrisal Syahrisal; Henny Pasandang; Rusdi Nur; Muhira Dzar Faraby; Mukhlisin Mukhlisin
International Journal of Advances in Applied Sciences Vol 15, No 1: March 2026
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijaas.v15.i1.pp343-354

Abstract

Steel generally exhibits poor wear and friction resistance, making it necessary to improve its surface mechanical properties, particularly hardness and microstructure, to enhance performance. Heat treatment is one of the most effective methods for achieving these improvements. This study aimed to optimize the heat treatment parameters of S45C medium-carbon steel to improve hardness and impact strength using response surface methodology (RSM). Experimental trials were conducted at annealing temperatures of 800 °C, 850 °C, and 900 °C with holding times of 30, 60, and 90 minutes, followed by cooling in water, oil, or air. Hardness (HRC) and impact strength (Nm/mm²) were measured, and the data were analyzed using RSM with a central composite design (CCD). Quadratic models were found to be statistically significant for both hardness (Prob > F = 0.0222) and impact strength (Prob > F = 0.0338), confirming their validity. The optimization results indicated that a holding time of 60 minutes within the 850-900 °C range provides the best balance between high hardness (>55 HRC) and adequate impact strength (>0.68 Nm/mm²). These findings not only validate the predictive capability of RSM in heat treatment optimization but also provide practical guidelines for industrial applications of S45C steel in automotive, tooling, and structural components.