A Simulation Model of Construction Projects Executed in Random Conditions with the Overlapping Construction Works

Biruk, Sławomir; Rzepecki, Łukasz

doi:10.3390/su13115795

Cited by 8 publications

(7 citation statements)

References 43 publications

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“…Faghihi et al compared existing studies and found that the research on optimizing construction scheduling mainly focuses on the temporal aspects of the project schedule [4]. However, the importance of working space availability at an assigned location tends to be ignored [5][6][7][8][9].…”

Section: Literature Review 21 Takt-time Planning Methodsmentioning

confidence: 99%

Duration and Labor Resource Optimization for Construction Projects—A Conditional-Value-at-Risk-Based Analysis

Ding,

Liu,

Hsiang

et al. 2024

Buildings

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The complexity and uncertainty of construction projects contribute to low efficiency in the construction industry. This research applied the Takt-time planning method to optimize the construction working process, and proposed a risk control framework based on Value at Risk (VaR) and Conditional Value at Risk (CVaR) approaches to explore and predict a project schedule and cost performance under different scenarios. This research selected a high-rise residential building project for a case study and collected 1672 productivity data samples. Arena Simulation models were established based on 90 combinations of labor assignments to assess Takt-time planning strategies’ impact on project performance in four scenarios. The VaR and CVaR evaluations at 75% and 90% confidence levels were compared to balance project benefits and risks. Without any overtime or additional workers, this research found a Takt-time planning method that can reduce the project duration by 20.2% and labor costs by 2.1% at the same time, using a labor assignment of 12 bar placers, 12 carpenters, and 5 pipefitters. The findings can assist construction managers to achieve a shorter duration, reduced cost, and safer work environment, which will be very effective and beneficial to improve project overall performance.

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Section: Literature Review 21 Takt-time Planning Methodsmentioning

confidence: 99%

Duration and Labor Resource Optimization for Construction Projects—A Conditional-Value-at-Risk-Based Analysis

Ding,

Liu,

Hsiang

et al. 2024

Buildings

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“…Fixed cost perusahaan juga dipercaya akan berkurang seiring dengan penghematan yang diperoleh dari penerapan metode fast-track. Hal ini juga merupakan kelebihan dari metode fast-track dibandingkan dengan metode lainnya seperti crashing atau time cost trade off (TCTO) dimana upaya percepatan terhadap jadwal kerja akan berdampak pada perlunya penambahan sumber daya dan meningkatnya pembiayaan proyek (Widyo Kisworo & Sri Handayani, 2017) (Kim et al, 2012) (Biruk & Rzepecki, 2021) (Abuwarda & Hegazy, 2019).…”

Section: Pendahuluanunclassified

Percepatan Penyelesaian Proyek Menggunakan Metode Fast-Track (Studi Kasus: Proyek Gedung Serbaguna PLBN Entikong Kalimantan Barat)

Wiharti

Winanda²,

Munasih³

et al. 2022

JRSL

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Construction projects have unique, dynamic, and complex characteristics; therefore, frequent inaccuracies between planning and implementation are found. It generates a budget change as a consequence. Project delays also occurred in Entikong PLBN Multi Purposes Building Project, West Kalimantan; therefore, an “addendum” time had to be submitted for the 31st week. According to the identified problems, the purpose of this study is to analyze the time acceleration to achieve project time reduction and cost savings. The analytical approach uses a fast-track method widely applied and proven effective in time reduction through overlapping the critical activities. The result of the project schedule shows that the normal duration of 359 days turned into 302 days; therefore, a reduction in time of 57 days can be obtained. Time reduction through project acceleration was 15,88% without causing an overallocated resource. The time reduction impacts project cost efficiency, especially in indirect cost savings of Rp 17.345.955. Implementing the fast-track method by paying attention to the allocation and availability of resources provides an optimal schedule. Thus, the risk of unrealized activities due to acceleration can be minimized. ABSTRAK Proyek konstruksi memiliki karakteritik unik, dinamis dan kompleks,sehingga sering ditemukan ketidaktepatan antara perencanaan dan pelaksanaan. Pada saat waktu penyelesaian proyek tidak sesuai dengan perencanaan, hal ini membawa konsekuensi pada perubahan pembiayaan proyek. Keterlambatan proyek juga terjadi pada proyek gedung serbaguna PLBN Entikong, Kalimantan Barat sehingga harus dilakukan addendum waktu pada minggu ke-31. Berdasarkan pada permasalahan yang teridentifikasi, maka tujuan dari penelitian ini adalah menganalisis percepatan waktu sehingga diperoleh pengurangan waktu pekerjaan dan penghematan biaya proyek. Pendekatan analisis menggunakan metode fast-track dimana telah banyak diimplementasikan dan terbukti secara efektif dalam mereduksi waktu penyelesaian dengan menata aktivitas-aktivitas kritis secara tumpang tindih (overlapping). Hasil penjadwalan proyek menunjukkan bahwa durasi normal proyek selama 359 hari menjadi 302 hari, sehingga terjadi reduksi sebanyak 57 hari. Pengurangan waktu dengan melakukan percepatan adalah sebesar 15,88% tanpa menyebabkan overallocated sumber daya. Pengurangan waktu berdampak pada efisiensi biaya proyek, yaitu penghematan biaya tidak langsung sebesar Rp 17.345.955. Penerapan metode fast-track dengan memperhatikan alokasi dan ketersediaan sumber daya, dapat memberikan jadwal yang optimal. Dengan demikian resiko tidak terlaksananya aktivitas akibat percepatan dapat diminimalkan.

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“…The construction process is unique and non-replicable (Liu et al, 2019) due to project-specific construction conditions (Biruk and Rzepecki, 2021). Therefore, it is not appropriate to directly compare actual construction processes (i.e., processes of constructing projects with the same design using different methods).…”

Section: Comparative Analysismentioning

confidence: 99%

Reconsidering adaptive industrialized construction in Chinese rural areas: responding to the challenge of COVID-19

Xiang

Zhu

et al. 2022

Building Research & Information

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The spread of COVID-19 has caused an increasing demand for public medical rooms, especially in Chinese rural regions. Industrialised building techniques have been shown as capable of fulfilling this demand through the case of the Leishenshan Hospital. However, industrialised construction requires developed technologies and infrastructures, which are often non-existent in rural areas, thus making it difficult to replicate such a feat. Therefore, more suitable solutions for Chinese rural project delivery in the pandemic scenario are needed.Considering the constraints of pandemic prevention and rural applicability, the adaptive industrialised construction (AIC) method has potential as an alternative. This study evaluates the application of AIC by comparing simulated results using AIC and a conventional method, based on five evaluation indicators: construction speed, labourer distribution, material consumption, equipment utilisation, and cost. Taking an actual project as the sample building, the results indicate that the AIC method has several advantages. These include a shorter construction period, less labourer gathering onsite, and a lower cost, suggesting it may be an effective solution for rural project delivery during the pandemic. Architects and contractors could employ the same evaluation method to explore more solutions and optimise the construction schedule for future rapid construction needs in rural areas in a pandemic.

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A Simulation Model of Construction Projects Executed in Random Conditions with the Overlapping Construction Works

Cited by 8 publications

References 43 publications

Duration and Labor Resource Optimization for Construction Projects—A Conditional-Value-at-Risk-Based Analysis

Duration and Labor Resource Optimization for Construction Projects—A Conditional-Value-at-Risk-Based Analysis

Percepatan Penyelesaian Proyek Menggunakan Metode Fast-Track (Studi Kasus: Proyek Gedung Serbaguna PLBN Entikong Kalimantan Barat)

Reconsidering adaptive industrialized construction in Chinese rural areas: responding to the challenge of COVID-19

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