Design of a BIM-based Dynamic Monitoring and Audit Traceability System for Engineering Costs
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Abstract
Dynamic monitoring and audit traceability of engineering costs require integrated processing of BIM components, cost data, contract information, and construction progress. Traditional cost-management workflows based on manual quantity take-off and scattered documents have limited ability to support real-time control and complete audit paths. This study proposes a BIM-based dynamic monitoring and audit traceability system for engineering costs. A component-level mapping mechanism integrates bills of quantities, contract information, construction progress records, and cost items into a unified data structure. Based on BIM parametric modeling, quantities are automatically extracted, dynamic cost models are updated through timestamps and version control, and cost deviations are identified through planned-value, actual-cost, and deviation-value comparison. A schedule-cost coupling model is further introduced to detect abnormal cost changes caused by progress delays or rushed work. For traceability, a data-log and version-tracking mechanism records cost data generation, modification, and confirmation, while multi-source association auditing links components, business events, and cost results. Experiments show that cost-calculation time decreases from 128.5 s to 42.7 s, deviation identification increases to 92.8%, and audit-path completeness reaches 95.6%. The system supports BIM-based data integration, engineering monitoring, and traceable decision support.
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