The design phase is a crucial stage for cost control and plays a decisive role in determining the overall expenses of engineering projects. Controlling costs during the scheme design process means addressing the root causes of expenses. This stage involves variable and complex factors, making it essential to analyze plans scientifically and align them with real-world investigations to ensure effective control without detachment from reality. During the conceptual design phase, design decisions significantly impact project costs. The quality of design directly influences construction expenses and project timelines, ultimately reducing total investment.
In theory, cost control during the design phase of engineering projects in China mainly involves design estimation during scheme planning and preliminary design estimation after completion. However, in practice, many construction projects overlook these estimations and focus mainly on cost control during the construction phase, missing the best opportunity to manage costs at their origin.
The first step in controlling costs for any engineering project lies in the design phase. When properly utilized, this phase offers the best opportunity to manage and optimize expenses. Therefore, cost control must be integrated during the design process, as it is the most direct and effective method.
Traditionally, communication between different design stages relies heavily on drawings, with each phase represented by separate design documents. This approach often leads to information flow problems and inconsistencies in design. Information sharing across phases and disciplines is limited and not updated in real time. BIM technology transforms this process by allowing the integration of data models from various disciplines into a single model from the earliest design stages. Through BIM’s virtual environment, design data can be shared and updated in real time, improving collaboration and accuracy.
Currently, China emphasizes that cost control in the early design stages of construction projects depends on the design budget during the scheme design phase and the design estimate in the preliminary phase. However, traditional graphic design drawings lack the ability to provide accurate, intuitive, and quantitative data during design and construction, making effective cost management and engineering accounting difficult. As a result, cost control efforts often shift to the construction phase, leading to missed opportunities.
By adopting BIM technology, project teams can optimize design solutions early in the project lifecycle, proposing cost-effective, high-performance, and high-quality options.
Implementing cost control within the design process using BIM models is highly practical. BIM models include not only geometric data of building spaces and components but also their physical properties. This rich data can be imported into specialized software for statistical analysis. Computer programs can automatically generate quantity reports based on component attributes, eliminating the need to rebuild calculation models for quantity takeoffs. This saves time and provides timely, accurate cost indicators aligned with the actual project. Ultimately, BIM offers strong technical support for cost control and optimization during the design phase, enabling proactive and timely cost management.
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