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All Journal Paduraksa : Jurnal Teknik Sipil Universitas Warmadewa KERN Jurnal Ilmiah MITSU (Media Informasi Teknik Sipil Universitas Wiraraja) RACIC : Rab Construction Research Jurnal Teknik Sipil dan Teknologi Konstruksi Nusantara Science and Technology Proceedings Jurnal Sains Teknologi dalam Pemberdayaan Masyarakat Journal of Civil Engineering Science & Technology (CI-TECH) Jurnal Teknik Sipil KERN : Jurnal Ilmiah Teknik Sipil Envirotek : Jurnal Ilmiah Teknik Lingkungan
Anna Rumintang
Department Of Civil Engineering, Faculty Of Engineering, Universitas Pembangunan Nasional “Veteran” Jawa Timur, Surabaya 60294, Indonesia
Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Energy Engineering Environmental Science Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Transportation Other

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ANALISIS PEMBIAYAAN INVESTASI PADA PEMBANGUNAN PERUMAHAN TAMAN KARANGBAHAGIA TAHAP 1 KABUPATEN BEKASI, JAWA BARAT Rossy Khairinisa; I Nyoman Dita Pahang Putra; Anna Rumintang
PADURAKSA: Jurnal Teknik Sipil Universitas Warmadewa Vol. 9 No. 1 (2020)
Publisher : Program Studi Teknik Sipil, Fakultas Teknik dan Perencanaan, Universitas Warmadewa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22225/pd.9.1.1479.1-10

Abstract

In the development planning of a project, a financial analysis is needed that indicates the investment process of the project is feasible. One of the most important aspects of the investment process is the composition of financing. Funding can be divided into two, namely from loans and equity. The study was conducted on the Karangbahagia Park Housing development project in Bekasi, West Java. The purpose of this study was to determine the sensitivity of three different financing compositions. This research was conducted using the Discounted Cash Flow method to calculate the project valuation. Then the investment feasibility is measured by NPV (Net Present Value), IRR (Internal Rate Return), BEP (Break-Even Point) and ROI (Return on Investment) indicators. The three financing compositions to be investigated are 70% loan: 30% equity. 30% loan: 70% equity and 50% loan: 50% equity. The results of the composition sensitivity analysis show that in the composition of 30% loan: 70% equity NPV reached a positive number of IDR.17,485,230,641.00 and IRR 38%. While on the composition of 70% loan: 30% equity NPV negative and IRR reached values of IDR.9,126,201,503.00 and 2%. In the composition of 50% loan: 50% equity, namely NPV reached a value of IDR.4,179,514,569.00 and IRR 21%. BEP occurs after one year and ten months and Return on Investment yields a figure of 16.71% from the composition of 30% loan: 70% loan.
OPTIMALISASI PRODUKTIVITAS ALAT BERAT PADA PEKERJAAN PENGGALIAN SALURAN Elena; Anna Rumintang Nauli; Elok Dewi Widowati
Racic : Rab Construction Research Vol. 11 No. 1 (2026): JUNI
Publisher : LPPM Universitas Abdurrab

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36341/racic.v11i1.6525

Abstract

Drainage excavation is a crucial activity in road construction projects, relying heavily on the effectiveness of heavy equipment to achieve time and cost efficiency. This study aims to compare the theoretical and actual productivity of heavy equipment, calculate idle time, and optimize the number and combination of equipment to improve operational efficiency. The research was conducted over a seven-day period using the time study method at the South Cross Road Project Lot 2 in Blitar Regency. Data were obtained through observations of equipment cycle time, working duration, and the volume of completed excavation. The results revealed significant differences between theoretical and actual productivity. The rock drill breaker had a theoretical productivity of 489.28 m³/day and an actual productivity of 434.48 m³/day; the excavator showed 950 m³/day theoretically and 830.80 m³/day in the field; while the dump truck recorded 464.80 m³/day in theory and 388 m³/day in practice. Idle time was also found to be relatively high, with 1.99 hours/day for the rock drill breaker, 1.71 hours/day for the excavator, and 3.51 hours/day for the dump truck. After optimization through adjustments in equipment quantity and standardizing the work duration to six days, idle time was successfully reduced to 0.98 hours/day, 0.66 hours/day, and 0.14 hours/day, respectively. These findings highlight that proper planning of heavy equipment, in terms of both quantity and working time, plays a critical role in enhancing work efficiency in drainage excavationprojects.
ANALISIS PRODUKTIVITAS BATCHING PLANT READYMIX CONCRETE TIPE WETMIX DENGAN METODE TIME STUDY Fahmi Al Farabby Mustofa; Anna Rumintang Nauli; Elok Dewi Widowati
Racic : Rab Construction Research Vol. 11 No. 1 (2026): JUNI
Publisher : LPPM Universitas Abdurrab

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36341/racic.v11i1.6666

Abstract

The selection of heavy equipment has a significant impact on the efficiency and effectiveness of a project. In this study, a batching plant was chosen because readymix concrete is a sensitive component in the construction sector that can be optimized to save time and costs.This research aims to identify the stages of concrete production at a wetmix batching plant, determine the level of productivity achieved, compare the results with the company's standard productivity benchmarks, and analyze the factors influencing production activities during the observation period. The study employed direct measurement methods by observing the operator's tasks and recording the time taken. The research approach used is based on the time study method. The focus of the study is on the productivity of a wetmix type batching plant in producing Fc’ 30 grade concrete with the addition of fly ash. An analysis was then conducted to determine the cycle time, production capacity, and a comparison of productivity against the company’s standard benchmarks. The productivity of the wetmix batching plant in producing readymix concrete on May 5 and 6, 2025, averaged 84.76 m³/hour per cycle. Therefore, the batching plant of Company X has not yet met the company’s standard productivity requirements.
Implementasi dan Analisis Kinerja PJU Tenaga Surya untuk Peningkatan Kualitas Pencahayaan di Kawasan Technopark UPN “Veteran” Jawa Timur Sumaidi; Wahyu Kartini; Anna Rumintang Nauli
Jurnal Sains Teknologi dalam Pemberdayaan Masyarakat Vol. 7 No. 1 (2026): Juli 2026
Publisher : Fakultas Teknik Universitas Bhayangkara Jakarta Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31599/75vnea30

Abstract

Poor lighting at the Technopark access of UPN "Veteran" Jawa Timur creates security risks and energy inefficiency. This study aims to implement an energy-independent Solar Street Light (PJU-TS) system to support the Green Campus vision. Using applied research methods, the activities included needs analysis, system design, physical installation of four All-in-One PJU-TS units, and performance evaluation. Post-installation results showed a drastic increase in average light intensity from <1 Lux to >10 Lux, meeting SNI 7391:2008 standards. The light sensor-based automatic control system proved effective in managing dusk-to-dawn operations, optimizing LiFePO4 battery usage. This implementation successfully eliminated blind spots, significantly improved the academic community's sense of security, and serves as a model for eco-friendly and energy-efficient campus infrastructure. 
Co-Authors Adi Nugroho Santoso Aguslina, Asfitri Alyaa Athooya Minarosi Ardila Mulyani Larasati Eka Nurus Sakinah Elena Elok Dewi Widowati Fahmi Al Farabby Mustofa Fithri Estikhamah Gigih Bambang Sutarji Hendrata Wibisana Jayawiguna, Krisnanta nur hanifah eka putri NYOMAN DITA PAHANG PUTRA, NYOMAN Pinky Febrilla Carienta Putri Rossy Khairinisa Santi Dwi Rahmawati Siti Zainab Sumaidi Sumaidi Sumaidi Sumaidi Wijaya wahyu kartini Wahyu Kartini Zetta Rasullia Kamandang