Salim, Mohd Razman
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TECHNICAL RISK LEVELS AFFECTING PROJECT TIME PERFORMANCE IN THE CONSTRUCTION OF ONAN RUNGGU PORT PHASE I, NORTH SUMATRA Sihotang, Parlindungan; Naibaho, Pio Ranap Tua; Salim, Mohd Razman
INDONESIAN JOURNAL OF CONSTRUCTION ENGINEERING AND SUSTAINABLE DEVELOPMENT (CESD) Vol 8 No 2 (2025): INDONESIAN JOURNAL OF CONSTRUCTION ENGINEERING AND SUSTAINABLE DEVELOPMENT (CESD)
Publisher : Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/

Abstract

The Phase I development project of the Onan Runggu Port in Samosir Regency, North Sumatra, is a strategic government initiative to improve connectivity and water transportation access on Lake Toba. This port is expected to stimulate local economic growth and the development of the tourism sector. However, the project faces a number of technical risks that can disrupt its smooth implementation and timely completion. Based on the analysis, one risk was found to be on a medium scale, eighteen risks on a high scale, and one risk on an extreme scale. Risk control can be carried out through preventive and corrective measures, such as weather monitoring, work schedule adjustments, technical drawing inspections, and the implementation of a strict quality control system. In addition, preparing backup materials and equipment, as well as worker training, is very important. These risk controls aim to reduce the impact on the time performance of the Phase I Onan Runggu Port development project in North Sumatra.
COMPARATIVE ANALYSIS OF THE CUT-AND-COVER AND TOP-DOWN METHODS FOR BASEMENT CONSTRUCTION IN TERMS OF TIME AND COST ON THE WAHID HASYIM APARTMENT BUILDING PROJECT Laia, Insyaf Maret; Naibaho, Pio Ranap Tua; Salim, Mohd Razman
INDONESIAN JOURNAL OF CONSTRUCTION ENGINEERING AND SUSTAINABLE DEVELOPMENT (CESD) Vol 8 No 2 (2025): INDONESIAN JOURNAL OF CONSTRUCTION ENGINEERING AND SUSTAINABLE DEVELOPMENT (CESD)
Publisher : Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/

Abstract

Basement structure work is a crucial part of constructing multi-story buildings, especially in dense urban areas with limited workspace or heavy equipment maneuverability. This study aims to analyze the comparison between two basement construction methods, namely the Cut-and-Cover method and the Top-Down construction method, using a case study on the Wahid Hasyim Apartment building project in Medan, North Sumatra. The analysis is based on two main parameters: execution duration and construction cost. The research findings indicate that the Cut-and-Cover method requires an execution time of 215 days with a total cost of Rp. 59,297,411,788.65. Meanwhile, the Top-Down method only requires an execution time of 164 days with a total cost of Rp. 48,012,728,671.13. Based on these results, the implementation of the Top-Down construction method is proven to be superior, with a time effectiveness of 23.72% and a cost efficiency of 19.03% compared to the Cut-and-Cover method. This is because with the Top-Down method, several work items can be performed concurrently.