According to these MVDs soft ware vendors develop corresponding IFC interfaces

According to these mvds soft ware vendors develop

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views for software tools. According to these MVDs, soft- ware vendors develop corresponding IFC interfaces to extract the required information from the original model. In summary, the current information delivery process is mainly divided into two parts: an IDM that identifies required information in a human-readable form for the particular task, and an MVD that integrates and translates IDM elements to corresponding model views, which can be supported by software tools. It is difficult for project us- ers to deliver required information from a complete model because of additional translators based on IDM and MVD. To integrate ERs and software implementation, a method that allows users to define ERs and forms the required model is proposed to improve information delivery. Fig- ure 2 illustrates the technical architecture of the proposed method for information delivery. Step 1. In Figure 1, the elements including PMs, ERs, and FPs need to be defined by project users. Only the PM needs to be defined in this new method, and other ele- ments can be implemented in the ER Matrix. Since too many notations exist in the BPMN standard, the proposed PM of structural design for collaboration is defined by us- ing simplified BPMN notations, in order to improve the accuracy and efficiency of PM definition. Subsection 1.1 presents the details of this PM definition. Step 2. In the traditional method shown in Figure 1, MVD developers have to define IFC entities/attributes one by one for forming a corresponding MVD. To improve the efficiency of ER definitions, an ER Matrix of structural de- sign was proposed. Users can define required objects and attributes according to different ERs of building projects. Through the exchange model generation algorithm, these required objects and their attributes can be mapped to the designated IFC data, avoiding manual data processing. Subsection 1.2 describes the proposed ER Matrix in detail. Step 3. According to the defined MVD, software ven- dors have to develop corresponding algorithms to extract required model data from native models. However, the algorithms may vary depending on data formats of soft- ware. Unlike this step in Figure 1, the ERs in the proposed matrix can be mapped to related IFC entities and their attributes through an IFC-based algorithm, and then the target model is generated. A delivery tool has been devel- oped to automatically generate the target model according to the ER Matrix. Subsection 1.3 introduces the mapping between the ER Matrix and IFC data. Figure 1. Current information delivery process based on IDM and MVD Figure 2. Improved information delivery process based on user-defined exchange requirements
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562 H. Lai et al. Exchange requirement-based delivery method of structural design information for collaborative design ...
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