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All Journal Rekayasa Teknik Sipil Rang Teknik Journal Jurnal Teknologi dan Manajemen
Saraswati, Nina
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Civil Engineering, Building, Construction & Architecture Computer Science & IT Electrical & Electronics Engineering Engineering

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DEVELOPING A METHOD FOR MEASURING THE QUALITY OF A SAMPLE BASED TRIP LENGTH DISTRIBUTION FOR URBAN TRIP Suprayitno, Hitapriya; Saraswati, Nina; Fajrinia, Citto Pacama
Rekayasa Teknik Sipil Vol 3, No 3/REKAT/16 (2016): Wisuda ke-87 Periode 3 Tahun 2016
Publisher : Rekayasa Teknik Sipil

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Abstract

Trip Length Distribution is an important part of Transportation Modelling. This distribution is normally gotten from a sample. Thus, the Quality of the Sample Based Distribution must be able to be measured. This paper present the result of an attempt to develop a method to measure this quality. The research gave the following result. Basic common measure related to the sampling is a maximum acceptable error at a certain minimum confidence level. It has been found that the Quality Measuring Method can not incorporate the error, since it deals with a distribution pattern in which there is no single parameter value and the error probability density function is not yet known. The proposed Sample Quality Measuring Method is by calculating its Confidence Level based on the Goodness of Fit Statistical Inference method, by using a c2 test. The Confidence Level is equal to  P(c2,u);  where  c2 = S (Oi ? Ei)2/ Ei and u = k ? r ? 1. Keywords : transport modelling, trip length distribution, sample, sample quality.
Analysis of Use Formwork and Slipform Pavers in Making Concrete Barrier on Toll Road Project Aditama, Akhmad Taufik; Saraswati, Nina; Satriawan, Puthut
Jurnal Teknologi dan Manajemen Vol 7, No 1 (2026): January
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat ITATS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jtm.2026.v7i1.8308

Abstract

The making of concrete barrier on the KAPB Toll Road Project Package II Section 1 still uses manual formwork. The use of manual formwork is considered easier to implement, but less efficient because concrete barrier in the form of prototypes should be done practically. Innovation in the field of construction has created Slipform Paver to print concrete barrier. Slipform pavers are believed to be able to produce better productivity than manual formwork. This study analyzed productivity, work duration and costs in the use of molding concrete barrier as an effort to accelerate work. Observations on the making of concrete barrier were carried out in one cycle time from land preparation to finishing the work. Concrete barrier made with manual formwork use readymix concrete FC 20 slump + 10 cm, while slipform pavers use readymix concrete FC 20 slump 4-5 10 cm. The results of the study showed that in making concrete barrier the use of slipform pavers can accelerate the completion of work by up to 46.01% and save costs by 14.3% compared to using manual formwork. In working on all concrete barrier using manual formwork can be done, but requires additional resources so that it can be completed on time.
ANALISIS KETERLAMBATAN PROYEK PENINGKATAN JALAN KREMBUNG-MOJORUNTUT KABUPATEN SIDOARJO Masliyah, Masliyah; Saraswati, Nina; Firmansyah, Mohammad Afif Ardian
Rang Teknik Journal Vol 9, No 2 (2026): Vol. 9 No. 2 Juni 2026
Publisher : Fakultas Teknik Universitas Muhammadiyah Sumatera Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31869/rtj.v9i2.7574

Abstract

Delays are a frequent challenge in construction projects, often arising from a combination of internal and external factors. This study focuses on analyzing delays in the Krembung–Mojoruntut Road Improvement Project in Sidoarjo Regency. A quantitative approach was adopted, utilizing the Earned Value Management (EVM) method to assess both cost and time performance. Data were collected from contract documents, S-curves, daily reports, and weekly progress updates spanning 27 weeks of project implementation. The analysis centered on three key indicators: Budgeted Cost of Work Scheduled (BCWS), Budgeted Cost of Work Performed (BCWP), and Actual Cost of Work Performed (ACWP). The findings reveal that the project experienced delays almost every week, with varying degrees of deviation, necessitating two schedule addendums. In the 26th week, the Schedule Performance Index (SPI) was 0.96, indicating a slight lag behind schedule, while the Cost Performance Index (CPI) was 1.05, showing that the project remained cost-efficient. The estimated total cost at completion (Estimate at Completion/EAC) was Rp10,067,384,650.67, slightly below the original contract value, while the estimated completion time (Estimate at Schedule/EAS) aligned with the revised target, thanks to the additional time granted through the addendums. Key factors contributing to the delays included late material procurement, adverse weather conditions, and less-than-optimal workforce management (Kharina Sambowo; Mahapatni Putra, 2022).Keywords: Project Delay, Estimate At Completion, Estimate At Schedule
ANALISIS PERBANDINGAN PENGGUNAAN BEKISTING PADA PEKERJAAN MUT PROYEK RUSUN PASPAMPRES IKN Saraswati, Nina; Masliyah, Masliyah; Riyanto, Sandi Dwi
Rang Teknik Journal Vol 9, No 2 (2026): Vol. 9 No. 2 Juni 2026
Publisher : Fakultas Teknik Universitas Muhammadiyah Sumatera Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31869/rtj.v9i2.7555

Abstract

The use of conventional formwork and formwork systems in Multi Utility Tunnel (MUT) construction projects has focused on cost efficiency, quality of work results, and implementation time. A case study was conducted on the Paspampres Flats construction project in the Indonesian Capital City (IKN)Abdullah (2024). The analysis involved identifying material, labor, and equipment costs, evaluating the quality of concrete casting, and measuring the duration of installation, casting, and dismantling. The findings indicate that system formwork outperforms conventional formwork across all three aspects. In terms of cost, system formwork is more efficient for large and repetitive projects as it can be reused multiple times and reduces material waste. Rossaty and Safitri (2022)Regarding quality, system formwork produces smoother, more precise concrete surfaces with minimal leakage. From the perspective of time, the modular characteristics of system formwork accelerate installation and dismantling processes. Therefore, the application of system formwork in MUT projects proves to be more optimal and aligns with modern construction efficiency principles, emphasizing faster execution and enhanced structural quality.Keywords: Conventional formwork, system formwork, cost efficiency, concrete quality, project duration, Multi Utility Tunnel (MUT)
Co-Authors Akhmad Taufik Aditama Fajrinia, Citto Pacama Firmansyah, Mohammad Afif Ardian Hitapriya Suprayitno, Hitapriya Masliyah, Masliyah Riyanto, Sandi Dwi Satriawan, Puthut