CASE STUDY OF PRODUCTIVITY COMPARISON IN BIM MODELING: PRECAST VS TRADITIONAL

Abstract

Productivity in Building Information Modeling (BIM) modeling plays a key role in project efficiency. However, the comparison between precast and traditional methods is still rarely studied. This research investigates the productivity comparison between BIM modeling methods and traditional construction execution on the Rumah Sakit Mitra Pumbon Subang project. The study uses a descriptive quantitative approach with data collected through 3D modeling (Autodesk Revit), scheduling (Microsoft Project), and 4D simulation (Autodesk Navisworks). The results show that BIM modeling requires more time (28 days) compared to the precast method (41 days) due to design complexity and more detailed object modeling in Revit compared to traditional CAD drawings. Meanwhile, the traditional construction method takes longer (153 days) compared to the precast method (137 days), due to the standardization advantages of precast work. In terms of material needs, BIM provides more precise calculations using the "Duplicate with Full Properties" and "Rebar Template Library" features in Revit. In conclusion, BIM modeling takes longer, but offers better precision and physical efficiency. This research emphasizes the importance of selecting the appropriate modeling method for optimal construction performance.