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All Journal Jurnal Teknovasi : Jurnal Teknik dan Inovasi Mesin Otomotif, Komputer, Industri dan Elektronika Jurnal Sistem Teknik Industri Journal of International Conference Proceedings
Humala Napitupulu
Universitas Sumatera Utara
Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology

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PERANCANGAN SISTEM INFORMASI KAMPUS TERINTEGRASI DI LINGKUNGAN POLITEKNIK LP3I MEDAN Iswandi Idris; Humala Napitupulu; Nazarudin Matondang
Jurnal Teknovasi : Jurnal Teknik dan Inovasi Vol 2, No 1 (2015): Teknovasi April 2015
Publisher : LPPM Politeknik LP3I Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55445/teknovasi.v2i1.41

Abstract

This study was conducted to obtain Integrated Information System（IIS）in Politeknik LP3I Medan (PLM), Analysis of the cost of an integrated information system design and integrate information systems in the campus environment. The subjects of the study a total of 336 samples. Cronbach Alpha reliability test values obtained 0.753 or reliable (reliability) is high. Correlation Test Double (R) of 0.247 or lower of a relationship between the independent variable on the independent variable. Test R2 (R Square) of 0.61 or (61%). F calculated > F Table (2,663> 1.9667), then H1 is accepted, it means There is significant effect between 8 independent variables together to SIT (dependent). T test showed 2 independen variabels rejected H0 means academic documentation process speed and sophistication of communication tools, collaboration and coordination between units in PLM partly no significant effect on the integrated information system. Using cost-benefit ratio analysis (Benefit Cost Ratio, BCR) then the total benefit greater than the total cost of 1 is 4.66 to SIT investment can be applied, and further integration of the SI strategy is applied. Scheme design of information systems will be easier to implement with a top-down and bottom-up, carried out in stages, starting from planning, analysis, design, preparation of DFD, design arsitekktur SIT.
ANALYSIS OF EFFECT OF SUPPLY CHAIN MANAGEMENT ON FIRM PERFORMANCE OF PASSION FRUIT SYRUP Kimberly Febrina Kodrat; Sukaria Sinulingga; Humala Napitupulu; Rika Ampuh Hadiguna
Journal of International Conference Proceedings (JICP) Vol 2, No 1 (2019): Proceedings of the 3rd International Conference of Project Management (ICPM) Bal
Publisher : AIBPM Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32535/jicp.v2i1.449

Abstract

Passion fruit (passifloraceae) is one of the strategic commodities because of its usefulness as raw material of passion fruit syrup as an agroindustry product that has rich nutritional value of vitamin C which is beneficial to human health. This research has five elements of supply chainnamely : farmers, suppliers, extract agroindustry, passion fruit syrup agroindustry, and retailers. The objective of this study is to analyze whether there is a significant influence between Supply Chain Management on firm performance. This type of research was a causal research. Data collection used questionnaire. From the result of multiple linear regression analysis, it showed that the variable of process integration has the biggest influence to variable of enterprise SCM performance (dependent) with coefficient value equal to (0,289), then variable of satisfaction with value (0,058), variable of trust (0,286), communication variable (0,184), dependency variable (0,021) and having the least was the variable of influence and commitment (0,080). This means that the five independent variables have a positive and significant influence on the dependent variable.
Humanity-Centered Design in Sustainable Product Design: Literature Review Geubrina Hikmah Sabri; Rosnani Ginting; Humala Napitupulu
Jurnal Sistem Teknik Industri Vol. 27 No. 4 (2025): JSTI Volume 27 Number 4 September 2025
Publisher : TALENTA Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jsti.v27i4.20838

Abstract

Product design has emerged as a crucial element in developing innovative solutions that prioritize not only functionality and aesthetics but also sustainability. The Human-Centered Design (HCD) approach has long been employed to ensure that user needs remain the primary focus throughout the design process. However, global challenges such as climate change, social inequality, and the long-term impacts of products necessitate a more comprehensive approach. Consequently, the concept of Humanity-Centered Design has been developed as an extension of HCD, emphasizing the importance of considering the entire ecosystem, other living beings, and long-term consequences in the product design process. This research utilizes a narrative literature review method to examine the Humanity-Centered Design (HuCD) approach within the context of sustainable product design. The review findings indicate that Humanity-Centered Design introduces five key principles, which include a focus on fundamental issues, a holistic ecosystem perspective, long-term outlook, continuous iteration, and community participation. This approach has been shown to enhance the relevance, acceptance, and sustainability of solutions across various sectors, including health technology, manufacturing, and digital domains.
Integration of Six Sigma, Fault Tree Analysis, and Design of Experiment in Welding Quality Improvement Praja Dinata Sembiring; Anizar; Humala Napitupulu
Jurnal Sistem Teknik Industri Vol. 28 No. 1 (2026): JSTI Volume 28 Number 1 January 2026
Publisher : TALENTA Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jsti.v28i1.23607

Abstract

The quality of water wall welding in boiler fabrication remains a critical issue, as a high welding defect rate of 25–30% can lead to leakage, increased repair welding, and reduced reliability of welded joints. This study aims to systematically reduce welding defects and improve the quality of water wall welded joints by integrating Six Sigma, Fault Tree Analysis (FTA), and Taguchi Design of Experiments (DOE). Six Sigma with the DMAIC framework was applied to evaluate process performance and define critical quality characteristics, while FTA was used to identify the dominant root causes of welding defects. The analysis revealed that suboptimal GMAW welding parameters—specifically welding current, root gap, groove angle, and travel speed—were the main contributors to defect formation in water wall welded joints. Taguchi DOE was subsequently employed to determine an optimal and robust combination of welding parameters. The results show that the optimal parameter setting increased the tensile strength of the welded joint to 495.08 MPa and improved the signal-to-noise ratio by 1.36 dB, indicating enhanced welding quality and process stability.The optimized parameters were implemented through an updated Welding Procedure Specification (WPS), enabling the improvement results to be consistently applied in production. This study demonstrates that the integrated Six Sigma–FTA–DOE approach provides an effective and systematic solution for improving water wall welding quality in boiler manufacturing.
Co-Authors Anizar Geubrina Hikmah Sabri Iswandi Idris Kimberly Febrina Kodrat Nazarudin Matondang Praja Dinata Sembiring Rika Ampuh Hadiguna Rosnani Ginting Sukaria Sinulingga