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All Journal Al-Kharaj: Jurnal Ekonomi, Keuangan & Bisnis Syariah
Christofora Desi Kusmindari
Universitas Bina Darma, Palembang, Indonesia
Agriculture, Biological Sciences & Forestry Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Industrial & Manufacturing Engineering Social Sciences

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Analisis Beban Kerja Mental Menggunakan Metode Nasa-TLX Dan RSME: Studi Kasus Sekolah Alam Palembang Ratih Mandasari; Christofora Desi Kusmindari; Yanti Pasmawati; Andries Anwar
Al-Kharaj: Jurnal Ekonomi, Keuangan & Bisnis Syariah Vol. 8 No. 11 (2026): Al-Kharaj: Jurnal Ekonomi, Keuangan & Bisnis Syariah
Publisher : Intitut Agama Islam Nasional Laa Roiba Bogor

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Mental workload and work fatigue have become global concerns, particularly in the education sector where teachers and administrative staff face high cognitive, emotional, and administrative demands. This study aims to analyze the level of mental workload experienced by teachers and administrative staff at Sekolah Alam Palembang (SAPA)—a nature-based school—using the NASA-TLX and RSME methods, and to examine the relationship between mental workload measured by NASA-TLX and mental effort measured by RSME. This research used a quantitative descriptive-correlational approach involving 33 respondents grouped into leadership, class teachers, subject teachers, and administrative staff. Data were collected through NASA-TLX and RSME questionnaires and analyzed using descriptive statistics, difference tests, and Pearson correlation. The results show that the mean NASA-TLX Weighted Workload score was 66.71 (high category), with 94% of respondents in the high to very high category; the Effort and Mental Demand dimensions were the most dominant, while Frustration was the lowest. The mean RSME score was 101.67 (high category), confirming the NASA-TLX findings. The leadership group consistently recorded the highest mental workload; differences between job groups were significant on RSME (Kruskal-Wallis, p = 0.038) but not on NASA-TLX (Welch ANOVA, p = 0.124). Length of service (junior versus senior) was not significantly related to mental workload. A moderate, significant positive correlation was found between NASA-TLX and RSME (r = 0.472; p = 0.006), supporting the convergent validity of both instruments. These findings imply the need for redistribution of dual-role workloads, stress-management programs, and periodic workload monitoring.
Analisis Ergonomi Komunikasi Pada Antarmuka Aplikasi Mobile "Gojek" Terhadap User Experience (UX) Fadhillah Zhafira; Christofora Desi Kusmindari; Ari Muzakir; Syahririzal Syahririzal
Al-Kharaj: Jurnal Ekonomi, Keuangan & Bisnis Syariah Vol. 8 No. 11 (2026): Al-Kharaj: Jurnal Ekonomi, Keuangan & Bisnis Syariah
Publisher : Intitut Agama Islam Nasional Laa Roiba Bogor

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The development of mobile applications requires interfaces that not only provide good functionality but also deliver an optimal User Experience (UX). One aspect that contributes to UX is communication ergonomics, which refers to how information is presented, understood, and responded to by users through an application interface. This study aims to determine the level of communication ergonomics on the GOJEK mobile application interface, measure the level of User Experience among users, analyze the effect of communication ergonomics on UX, and identify the communication ergonomics dimension that has the most dominant influence on UX. This study employed a quantitative approach using explanatory research. Data were collected through questionnaires distributed to active GOJEK users using a 1–5 Likert scale. The communication ergonomics variable consisted of five dimensions: information clarity, consistency, information load, navigation, and interactivity, while User Experience was measured based on attractiveness, perspicuity, efficiency, dependability, stimulation, and novelty. The data were analyzed using descriptive analysis and multiple linear regression with the assistance of SPSS. The results showed that the level of communication ergonomics in the GOJEK application was categorized as moderate to high, with mean scores ranging from 3.0117 to 3.2696. Interactivity obtained the highest mean score of 3.2696, while consistency obtained the lowest score of 3.0117. The level of User Experience was categorized as high, with a mean score of 3.4150. The F-test results indicated that communication ergonomics simultaneously had a significant effect on User Experience, with an F-value of 17.238 and a significance value of 0.000. Communication ergonomics contributed 37.4% to User Experience, while the remaining 62.6% was explained by other factors outside the research model. Partially, only the interactivity dimension had a significant effect on User Experience, with a significance value of 0.000. Interactivity was also identified as the most dominant factor, with a standardized beta coefficient of 0.418, followed by navigation with a beta coefficient of 0.264. Therefore, improving interactivity, particularly system responsiveness and the clarity of feedback, is an important aspect in improving User Experience on the GOJEK mobile application.
Pengembangan Prototipe Dongkrak Multiguna Elektronik dengan Pendekatan Ergonomi: Penetapan Dimensi Rancangan Berbasis Data Antropometri Achmad Ravy Tengku Sakti; Christofora Desi Kusmindari
Al-Kharaj: Jurnal Ekonomi, Keuangan & Bisnis Syariah Vol. 8 No. 11 (2026): Al-Kharaj: Jurnal Ekonomi, Keuangan & Bisnis Syariah
Publisher : Intitut Agama Islam Nasional Laa Roiba Bogor

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Abstract

Operating a manual jack requires a stooped posture and a large pushing force, which increases the risk of work-related musculoskeletal disorders. This study aims to determine the ergonomic dimensions of an electronic multipurpose jack prototype based on anthropometric data, to formulate the concept of a safe and intuitive electronic control system, and to identify the design implications for improving the operator's working posture. A quantitative descriptive approach was used with secondary anthropometric data obtained from the Indonesian Anthropometry database for adult users aged 25–40 years. Eight body dimensions (D1, D4, D15, D23, D24, D28, D29, and D36) were selected and their statistical consistency was verified against the normal distribution assumption using z values of ±1.645. Percentile selection rules were then applied: the 5th percentile for reach dimensions, the 95th percentile for clearance dimensions, and the 5th–95th percentile range for adjustable dimensions. Verification showed that the difference between the calculated percentiles and the source data was no greater than 0.01 cm, confirming that the data are suitable as a design basis. The resulting ergonomic dimensions are an adjustable control panel height of 98–111 cm (equivalent to standing elbow height, default 105 cm), a maximum control reach distance of 60 cm, a backup lever arm length of 40–45 cm, a grip length of 13–15 cm, and a grip diameter of 3.5–4.5 cm. This combination of percentile rules allows the design to accommodate approximately 90% of body-size variation within the user population. Relocating the operating point from near ground level to elbow height conceptually changes the working posture from stooping to standing upright. This study is limited to the dimensioning and conceptual stage; the physical prototype has not been fabricated, so claims of reduced physical workload remain predictive and require empirical verification through functional testing and posture assessment such as RULA or REBA.
Co-Authors Achmad Ravy Tengku Sakti Andries Anwar Ari Muzakir Fadhillah Zhafira Ratih Mandasari Syahririzal Syahririzal Yanti Pasmawati