The application of BIM technology in cost control during the decision-making phase of engineering projects includes the following aspects:
1. Collaborative Work. Traditional two-dimensional design drawings often result in numerous design issues due to poor communication between different disciplines and the challenge of interpreting abstract drawings. Addressing these issues typically requires design revisions, which can significantly delay construction and increase costs.
BIM technology enhances communication across disciplines by integrating all teams into a unified platform. This allows simultaneous design development and real-time sharing of updated models. Access permissions for model modifications can be controlled to prevent errors. Additionally, BIM software’s clash detection feature consolidates all professional models, identifies conflicts, and highlights them for easy review and correction, reducing costs from the early design stages.
2. Plan Optimization and Comparison. Traditionally, scheme optimization occurs after construction drawings are completed, involving the creation of 3D models from 2D drawings, followed by energy consumption analysis and subsequent adjustments. Poor coordination among architecture, equipment, and cost teams, combined with late-stage intervention, often leads to extensive rework and delays in subsequent design phases.
In contrast, BIM-based collaborative design involves multidisciplinary teams from the conceptual stage, considering the full lifecycle cost of the project. This early collaboration enables the selection of the most cost-effective design by factoring in operational expenses. BIM’s parametric capabilities and standards such as IFC and GBXML facilitate rapid data exchange, enabling quick design modifications, reducing repetitive tasks, and improving overall efficiency.
3. Quantity Takeoff and Estimation. Accurate quantity takeoff during the design phase is critical for validating the economic feasibility of a project. Traditionally, quantity estimators rely on CAD drawings and apply their own expertise and calculation rules to estimate quantities, with accuracy heavily dependent on individual skill.
BIM models serve as comprehensive databases of project components, enriched with detailed information. Using BIM tools, designers can efficiently finalize design schemes, and the detailed schedules generated provide precise quantity data for budgeting. These quantities can then be exported to localized cost estimation software via interfaces, enabling fast and accurate quantity calculations based on various rules.
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