Junichi Yagi

Development of virtual and real-field construction management systems in innovative, intelligent field factory

In this study, we proposed a concept of virtual and real-field construction management systems (VR-Coms), which is integrated with virtual construction simulation, planning, scheduling, and performance management systems to evaluate productivity and safety in virtual simulated and real-field constructions. And, we built up a computational environment to develop the VR-Coms. The VR-Coms offer supporting modules for learning and discovering solutions with objective to manage construction at right speed with improved humanware and constructability. The configuration of VR-Coms is described. This paper also shows an application of agent theory to construction management.

Automated Handling of Construction Components Based on Parts and Packets Unification

ABSTRACT: This paper proposes a method of pose (position and orientation) fitting of construction components in a construction site for automated handling based on the relation between components (parts) and their information (packets). Robots can acquire the required information of the component via the environmentattached storages, such as RFID devices. When an ID reader identifies an ID device, it should take some pose in its communication range. This fact may bring the idea of estimating the pose of a component that carries the device. In this idea, only single device identification cannot fix the pose of the component. We define the conditions of the ID reader and ID devices for the pose fitting, and propose a fitting method with at least two different identifications where two devices are not attached to the same plane or parallel planes of the component. Several examples of pose fitting show the feasibility of our idea.

Action-based union of the temporal opposites in scheduling: non-deterministic approach

Abstract It is the time resource that one deals with in scheduling. The task is how one can achieve the optimal allocation of a given time resource over a set of assigned activities. Most of the existing scheduling methods use a parametric time by which the activities are orderly allocated in accordance with the order of events. The parametric methods, however, fail in incorporating a dynamic aspect of scheduling that unfolds itself as the project proceeds, and also uncertainty that the starting and ending nodes of an activity fluctuate. This paper reformulates the concept of time to match to a dynamic scheduling through a non-deterministic approach. In particular, time can be regarded as an object in the holographic space, which models the dynamic aspects of time as a “mapped/represented” and “transformed/processed” temporal movement.

The 4+1 Dynamic Management System of Lifecycle

The life cycle management of a complex product like a constructed product needs to reconsider its engineering framework. The recent development of science, specifically physical and brain research provides us with an ingenious clue. The virtual control of time is now within our scope. This manuscript suggests its possible engineering implementation.

INTEGRATED CONSTRUCTION PROCESS MANAGEMENT SYSTEM

ABSTRACT This paper describes an implementation of an Integrated Construction Process Management System, which includes both manufacturing process management features for building parts and also construction progress management features at construction site. To monitor the flow of the building parts, RFIDs are stuck to all of the parts to be managed, and several checkpoints, which we named “gates”, are introduced within the coherent process through part-manufacturing plant line, logistic processes and building construction processes. By means of this, building parts can be tracked certainly, and anyone can know the status and the location of building parts at that instant.

OBSERVABLES OF OPPOSITES ALTERNATIVES IN DECISION MAKING

ABSTRACT Project management requires a project manager to make a series of hard decisions as his project develops or prior to its commencement. A choice must be made more often rather than otherwise out of the opposite alternatives. This manuscript investigates a proper model for decision mechanism of choice out of the severely contending opposite alternatives, the source of complexity in consequences.

Action-Based 4+1 System of Life Cycle Housing Management

The author proposes the action-based 4+1 system for management of a constructed complex or construct, which consists of four operational functions and one integral function. They are “self-descriptive”, “self-sensing”, “self-image over history”, “self-search”, and finally their integral function, “self-judge”. The management system attempts to establish the means of real time adjustment between design firms, builders, and component material producers, not least to mention the owners or occupants, in short for the means and benefit of all the stakeholders throughout the lifecycle of a construct.

Logics of Becoming in Scheduling

Scheduling is for optimal allocation of time resource for activities. This paper reconsiders the concept of time as a dynamic framework for series of actions. Time resource is viewed as elastic bodies to incorporate fluctuation of becoming of events and their dynamic behaviour. Lastly, logic of becoming will be presented as foundation of scheduling.

Integrated Process Management System and RFID Directory Services

This paper describes an implementation of the Integrated Process Management System, which includes manufacturing process management for building parts, and also construction process management at construction site. To observe the flow of the building parts, RFIDs are stuck to all parts to be managed, and several checkpoints, which we named “gates”, are introduced within the coherent process through part-manufacturing and building construction. The requirements of the RFID directory services are also discussed.

Development of Virtual and Real-Field Construction Management System in Innovative, Intelligent Field Factory. Part 2: Development of Virtual Construction Field

Prototype system of virtual construction field was developed in this study. Making the production plan of architectural construction was attempted by using the system. As a result, it was confirmed that the virtual construction field was effective to the making of the production plan.