Thesis (Master)--İzmir Institute of Technology, İzmir, 2006. / Keywords: Concurrent design, industrial design. Includes bibliographical references (leaves. 63-69).

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Global competitiveness challenges manufacturing industry to bring to market well designed and manufactured new products at competitive prices, in as short a lead time as possible. To achieve this, inputs are needed from experts in a multitude of disciplines as well as from customers and suppliers. The overall design must be well orchestrated and integrated which has led to the evolution of the philosophy of Concurrent Engineering where the decisions about different aspects related to the product's life cycle, must be considered simultaneously. While the use of design teams is achieving some success there is a need for modern software tools which support the design process to be radically improved. Typically design for manufacture software systems provide only support for a single process e.g. design for assembly, design for machining, design for fixturing etc. However, when the full breadth of design for manufacture is considered there are many aspects that must be addressed. This leads to the need for information systems to be able to support multiple views of a product, where each view provides the appropriate representation to support at least one manufacturing perspective. This research has investigated the potential of product model based systems to support multiple viewpoints in Design for Manufacture. The research has focused on the design for manufacture of plastic injection moulded products and has explored the particular viewpoints of mouldability, mould design and mould manufacturing. The approach taken has been to explore particular information structures to support each Design for Manufacture application. Subsequently, the relationships between these information structures have been investigated and sets of translating mechanisms to convert information from one view to another have been designed. An experimental Product Model has been implemented using an object-oriented database. This contains a mouldability view, cavity and core design views and cavity and core machining views. Translation mechanisms between views have been implemented using Visual C++ language. The concept and implementation of this research have been tested through experiments using both rotational and prismatic products. This research has therefore shown that multiple viewpoint design for manufacturing can be supported by a combination of product model data structures and specific sets of translation mechanisms.

In the competitive environment, the manufacturing companies must focus on the requirements of the customers, short time-to-market, superior product quality and reducing manufacturing cost. Facing the tendency of global competition, it is impossible and uneconomic to satisfy the all demands of customers by enterprise¡¦s own resources. To survive and make profits, concurrent engineering and collaborative design have become popular approaches to product development among supply chains. Concurrent engineering and collaborative design are two systematic approaches to the integrated, concurrent design of products and their related process. According to the past study, R&D will take an expenditure of fifty percent to ninety percent of the whole product life cycle. For considering product design, manufacturing and assembly, it will improve the communication and coordination in the concurrent engineering environment, and reduce the engineering design change. In this paper we focus on the requiring of product design. We propose a process model to support collaborative product development (CPD). The required multi-disciplinary information for CPD will be handled via the processes of classification, transformation, analysis and optimization to assist the product development. This study can to reduce the conflict of different professional knowledge, and possibility the communication problem with the project, to promote the efficiency of collaborative development.

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This thesis demonstrates that a knowledge representation model can provide considerable support to concurrent engineering teams, by providing a sound basis for creation of necessary software applications. This is achieved by demonstrating that use of the knowledge representation model facilitates the capture, interpretation and implementation of important aspects of the multiple, diverse types of expertise which are essential to the successful working of concurrent engineering project teams. The varieties of expertise which can be modelled as instances of the knowledge representation model range from specialist applications, which support particular aspects of design, by assisting human designers with highly focused skills and knowledge sets, to applications which specialise in management or coordination of team activities. It is shown that both these types of expertise are essential for effective working of a concurrent engineering team. Examination of the requirements of concurrent engineering team working indicate that no single artificial intelligence paradigm can provide a satisfactory basis for the whole range of possible solutions which may be provided by intelligent software applications. Hence techniques, architectures and environments to support design and development of hybrid software expertise are required, and the knowledge representation model introduced in this research is such an architecture. The versatility of the knowledge representation model is demonstrated through the design and implementation of a variety of software applications.

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Thesis (M.S.)--Montana State University--Bozeman, 2005. / Typescript. Chairperson, Graduate Committee: Shi-Jie Chen. Includes bibliographical references (leaves 67-70).

Thesis (Ph.D.)--Pennsylvania State University, 2001. / Includes bibliographical references.

A review of techniques that support Concurrent Engineering or Simultaneous Engineering (CE/SE) is presented. It is shown that the management of projects consistent with the principles of CE/SE is hampered by the lack of a suitable activity network modelling tool. The limitations of existing methods such as the Critical Path Analysis Method (CPM) and the related Program Evaluation and Review Technique (PERT) for the management of complex design projects are demonstrated. Recent enhancements and alternatives to CPMlPERT are reviewed. A network model is proposed that supports CE/SE and is capable of representing uncertain task outcomes, partial dependencies and task iterations characteristic of complex design projects. Discrete-event simulation is used to evaluate the network and show the effect of resources constraints, communications efficiency and activity control logic on project completion timescales and product quality. The proposed model is designed so that the activity network can be derived from and directly related to a Quality Function Deployment (QFD) matrix. This allows project completion to be expressed in terms of customer requirements and priorities. The network model is illustrated by showing how it can be applied to an aerospace design project.