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As a working research group in this project in the last fiscal year, we have indicated a conceptual framework of
"Cyber Concurrent Management (CCM)" system by utilizing both for virtual manufacturing processes and for
real-field based manufacturing processes, which are covered with following phases: (1) product design, (2)
production system design, and (3) workstation system design. Figure 1 shows the research background of the
CCM system in the current fiscal year (2004) from the last fiscal year (2003).

The purpose of this paper is to propose the concept and method for modeling engineering process by using a
process modeling tool (it is henceforth called PE tool), and verifying validity of the modeled process results by the
various 3-dimensional computer graphic (3D-CG) simulators, based on the CCM system. As a case study for
that, we built a test bed system for the verification method of modeling according the construction process of the
"curtain wall" which constitutes the exterior wall of a high-rise building to the PE tool, and the model data based
on various 3D-CG simulators.
Modeling of engineering processes the viability of modeling
by process engineering lools | ;| data by 3D—CG simulator

Figure 1: Conceptual Framework of Cyber Concurrent Management System

RESEARCH SUBJECTS OF CCM SYSTEM

Figure 2 illustrates that the CCM system treats with a range of the engineering processes from product design,
production system design, to workstation system design. First, using PE tool, as it is in the left side of Figure 2,
modeling of each phase of construction processes is performed as follows: (1) product design, (2) production
system design, and (3) workstations system design. That is to perform: (1) product design which is considered of
assembling sequence and assembling efficiency based on a structure of BOM (bill of materials) consisting of
curtain wall materials, (2) production system design based on the assembling sequence of the product design, and
(3) workstation system design paying attention to human operation order for assembling materials in a
construction site.

Next step is "intermediate deliverables" of the construction process data of each phase in PE tools: (1) product
design; storing to the library of materials and conversion from Design BOM to Manufacturing BOM, (2)
production system design; integration of assembly process and delivery processes of material handling, (3)
workstation system design; work organization of two or more contractor's group work is carried out the resources
plan by using the PE tool. Since the construction process of such each phase is modeled, the technique called
process engineering is used.