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Comparative Analysis of Crawler Crane Productivity in Girder Erection: A Theoretical Study and Direct Observation Bawana, Massayu Sekar; Puspita, Milinda Nur Indah; Putra, I Nyoman Dita Pahang
CIVED Vol. 12 No. 1 (2025): March 2025
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/cived.v12i1.698

Abstract

Every construction project, in general, has a specific and systematic method implementation program, such as the utilization of heavy equipment in girder erection work. This focus is selected based on the high technical complexity of girder erection work, so the productivity of heavy equipment greatly affects the work's success. The aim is to analyze the suitability between theoretical calculation of crawler crane productivity and direct observations in girder erection work and identify the factors that cause the productivity difference. This study combines the theoretical calculations and direct observations to evaluate the productivity of crawler cranes in girder erection work. Based on theory, the method of calculating crane productivity is done by analyzing the operating cycle time and productivity of crawler cranes. With the direct observations method, actual data is taken in the field, which is then calculated as the result of its productivity. From the results of this study, it is found that the results of crawler crane productivity in direct observation in the field have a higher productivity value compared to the productivity value in theoretical calculations, namely 1.51 units/hour, while in theoretical calculations, the productivity value is 1.060 units/hour. The difference in value is caused by several factors in the field, such as weather conditions, operational obstacles, and the operator's efficiency.
FEASIBILITY EVALUATION OF THE RELATIONSHIP BETWEEN BCWS, BCWP AND ACWP IN ROAD CONSTRUCTION PROJECT Bawana, Massayu Sekar; Putra, I Nyoman Dita Pahang; Widowati, Elok Dewi
Multidiciplinary Output Research For Actual and International Issue (MORFAI) Vol. 5 No. 3 (2025): Multidiciplinary Output Research For Actual and International Issue
Publisher : RADJA PUBLIKA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54443/morfai.v5i3.2991

Abstract

The development of adequate infrastructure, such as roads, bridges, and other public facilities, play a vital role in driving national economic growth. Infrastructure projects require careful planning and controlled execution to ensure effective and efficient outcomes. This study focus on addressing the common issues of delays and cost overruns that frequently occur during project implementation. The objective is to analyze the alignment between planned and actual project performance. Using a quantitative methods, this research integrated the Earned Value Method (EVM) to assess project performance. The results indicate that, between weeks 26 and 39, the project generated performance that was both ahead of schedule and below budget. This is evidenced by positive values in both schedule and cost variance (SV and CV), along with the Schedule and Cost Performance Index (SPI and CPI) values exceeding 1. However in week 40, a decrease in schedule performance was observed, leading to a slight project delay. The project’s estimated overall cost is IDR 116.8 billion, representing a decrease from the initial budget allocation, with an estimated delay is only around 18 days.