The development of Building Information Modeling (BIM) is closely tied to the software used. Currently, popular BIM software for pricing and quantity calculation includes Navisworks (4D), Visual (4D) Simulation, Visual (5D) Estimation, and Visual (5D) Construction. Below, we explore the advantages and disadvantages of each.
Navisworks (4D)
Advantages:
1. Enables simulation and optimization of construction schedules, detects clashes, and links each planned task directly to model components;
2. Supports a wide range of model formats and features a user-friendly interface.
Disadvantages:
1. Requires high computer specifications and has long rendering times;
2. Model updates require re-importing and retesting, which is labor-intensive and inefficient for large-scale projects.
Visual (4D) Simulation
Advantages:
1. Supports 4D schedule planning and feasibility analysis;
2. Simple association between the schedule and model components.
Disadvantages:
After model changes, new tasks must be manually added before association, as automatic updates are limited.
Visual (5D) Estimating
Advantages: Automatically classifies and calculates quantities for components of the same type, enabling effective cost and project management.
Disadvantages: Does not align with China’s engineering cost calculation standards, requiring software modifications and extensive parameter settings.
Visual (5D) Construction
Advantages:
1. The 1.5D modeling process quickly detects clashes, helping to avoid changes during construction;
2. Real-time cost analysis based on the model produces more accurate results.
Disadvantages:
Significant differences exist between China’s quantity calculation rules, quota management system, and construction methods, limiting its direct application to cost management in Chinese construction projects.
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