Supply Chain Modeling For BIM-oriented Construction Schedule Management: CODP-based Classification Approach

In practice, construction projects frequently do not reach their targeted production performance. Reasons are often related to an undersized or disturbed Construction Supply Chain(CSC) management. Due to the sensitive interaction of production and supply processes, planning and analyzing the CSC is a challenging task.Building Information Modeling(BIM) provides an information technical support with an excellent ability to increase data interoperability, information quality and collaboration between the project participants within a construction project from the operational stage to the strategic stage, while CSC offers a systematized and lean thinking from the strategic level to the operational level. The information format of most BIM projects is based on Industry Foundation Classes(IFC). BIM becomes a driving force in bridging the stage of design and construction and it consequently changes the structure of a CSC within the range of a project. Simulation approaches are increasingly applied to support construction project for different goals of management and it is appropriate to be conducted under the guidance of thinking of CSC and BIM. This thesis aims to design a holistic schedule control model for BIM-oriented CSC.First, this thesis analyzes the information requirement of different supply members based on a qualitative investigation and presents the strategies of lead time management influenced by uncertainty based on Customer Order Decoupling Point(CODP) classification thinking. This research pays more attention to identify the modeling object of CSC and define the key metrics of different types of suppliers in a CODP classification thinking to achieve a better understanding of features of the supply members. It will contribute to reducing the local uncertainty of key supply members in CSC and help further clarify the overall CODP-based classification model as well.In the next stage of the study, efforts are made to integrate BIM models into CSC according to CODP-based rule. Providing new property parameters from QTO/BOQ/BOM(Quantity Take-off/Bill of Quantity/Bill of Materials) to the IFC model is one of the possible solutions to integrate supply and logistics data with BIM and applying CODP-based classification rules into the IFC model directly and linking it to other models for practical application is the second possibility. The CODP-based static construction supply chain model and dynamic reference supply schedule control model are introduced to support BIM-oriented CSC simulation and risk control.In the CODP-based static classification model, the CODP-based parameter definition, color scheme setting and general control strategy are discussed and the key point is to take full use of the classification management thinking in the BIM-oriented CSC context. Comparatively, in the dynamic reference supply schedule control model, the supply schedule is considered and linked with the construction schedule, which is called the reference supply schedule. After linking supply items with construction tasks, a checking mechanism is applied to inspect the supply status and measure the attention level of supply delay risk beforehand. In order to identify and control the risk of supply and even construction delay more visually and effectively, the BIM-based model view and supply process management strategies is introduced. The approach of BIM-oriented CSC modeling focuses on supply information integration with IFC model as well as the information exchange process among key CSC vertices. A BIM-oriented Order & SupplyPlan pattern is proposed to provide a basic information map associated with CODP-based classification and support the essential information exchange among the key participants.It is believed that the approach applied in CSC modeling can help elevate construction schedule controlling, supply lead time planning and BIM model development from the operational level to strategic level. However, there is more work to be carried out in the future, such as normalizing the required information in contract language and clarifying information exchange requirements need to be implemented.