Namchul Do

Propagation of engineering changes to multiple product data views using history of product structure changes

The present paper proposes a comprehensive procedure for engineering change propagation in order to maintain consistency between various product data views. A product data model is also proposed for the propagation procedure, which integrates base product definitions for product design, and product data views for other manufacturing or customer support. The product data view in the proposed model enables manufacturing or customer support engineers to define their own product data views, without copying the existing product definition. Integrated with other components, the engineering changes in the data model provide structure-oriented change history, effectivity management for production, and integration with product configurations. Based on the integrated product data model, the proposed procedure propagates engineering changes to product data views using the history of product structure changes. The propagation procedure maintains consistency of product data during collaboration between various design, manufacturing and customer support departments, who have different product data views. Prototype database applications together with an example of illustrative change propagation are also presented.

A Product Data Management architecture for integrating hardware and software development

This paper proposes an architecture of Product Data Management (PDM) for integrating Software Configuration Management (SCM). The proposed architecture extends its data model to support version items for SCM. Its applications support both PDM and SCM functionalities, as well as integrate hardware parts and software items in product configurations and engineering change management. The architecture is implemented by using a commercial Product Lifecycle Management (PLM) system. The implementation enables hardware engineers and software programmers to share the same user environment, on a consistent database during the collaborative product development.

Integration of engineering change objects in product data management databases to support engineering change analysis

This paper proposes a product data management (PDM) database that can support engineering change analysis (ECA).This study extends PDM databases to represent the EC history with existing product data and propose a multidimensional product data model for the PDM database for ECA.This study implements a prototype PDM system with on-line analytical processing (OLAP) tools and a data mining module for two typical ECA applications. This study proposes a product data management (PDM) database that can support engineering change analysis (ECA). It can integrate ECA with the existing main product development process managed by PDM systems. Since engineering change (EC) history is a key EC data element that enables ECA, this study extends PDM databases to represent the EC history with existing entities for ECs and associated products and their product structures. To show the feasibility of the proposed PDM database, this study integrates a prototype PDM system with on-line analytical processing (OLAP) tools and a data mining module for ECA. It also applies the implemented tools to two typical ECA applications, EC evaluation and EC propagation problems. The illustrative application examples show that the proposed PDM database can support ECA through multidimensional data analysis with OLAP and data mining with association rules.

Application of OLAP to a PDM database for interactive performance evaluation of in-progress product development

Abstract This paper applies online analytic processing (OLAP), a widely accepted database analysis technique, to a product data management (PDM) database to evaluate the performance of in-progress product development. This paper introduces a set of processing key performance indicators (KPIs) that can measure ongoing product development. To convert and analyze operational data in a PDM database with interactive OLAP operations, this study proposes a multidimensional data model specified by product facts with associated dimensions. The model is implemented using a commercial OLAP engine, and applied to a database supported by a prototype PDM system. The OLAP engine allows analysts to interactively evaluate the performance of in-progress product development in a multidimensional data space. This is a far more flexible and efficient approach than other result-oriented static evaluation approaches.

Interactive analysis of product development experiments using On-line Analytical Mining

We propose an On-line Analytical Mining based on product data analysis technique.We propose a comprehensive OLAM process based on the information system architecture.An experiment result shows the feasibility of the proposed architecture and process.The architecture and operations are important in ambiguous product development processes. This paper proposes an On-line Analytical Mining (OLAM) based product data analysis technique that analyzes product data in Product Data Management (PDM) databases. It aims to understand and evaluate product development processes indirectly through product data analysis. In this approach, OLAM integrates On-line Analytical Processing (OLAP) with data mining, allowing it to support flexible and interactive OLAP operations to find product data patterns in intangible and uncertain product development processes. This integration also allows efficient preparation of product data for various data analysis and data mining processes. In this paper, a product data analysis process and its information system architecture are proposed, and the prototype system is implemented to show the efficiency and feasibility of the approach. In addition, the proposed approach is applied to clarify critical failure factors in product development experiments to show that the proposed approach can help engineers proactively evaluate and manage in-progress product development processes.

Product Data Model for Supporting Integrated Product, Process, and Service Design

Namchul DoDep. of Industrial and Systems Engineering, ERI, Gyeongsang National University, 501 Jinjudaero, Jinju, GyeongsangnamdoThe current market preassure of least environmental effects of products needs companies to consider whole life cycle of their products during their design phase. To support the integrated and collaborative development of the products, this paper proposed product data model for extended Product Data Managemen (PDM) that can support integrated design of product, manufacturing process, and customer services, based on the consistent and comprehensive PDM databases. The product data model enables design, manufacturing, and service engineers to express their products and services efficiently, with sharing consistent product data, engineering changes, and both economical and environmental evaluations on their design alternatives. The product data model was imple-mented with a prototype PDM system, and validated through an example product. The result shows that the PDM based on the proposed product data model can support the integrated design for products, manufacturing process, and customer services, and provide an environment of collaborative product development for design, manufacturing and service engineers.

Developing a product data model using the STEP PDM schema for integrating specifications of technical services

Life-cycle-oriented technical services are product-centric customer supports that aim to maximise product performance over its life cycle. This article proposes an extended product data model that can specify technical services, taking into account the product design and manufacturing process supported as integrated product life-cycle data. This integration allows the proposed model to evaluate the cost or environmental effects of products from the view of the product life cycle. The model specifies the life-cycle-oriented technical services by extending the STEP PDM schema, a widely implemented international standard for product data management (PDM). It helps manufacturers to integrate their technical services with current product and process specifications by using their existing PDM systems. A design information system based on a commercial PDM system is implemented based on the proposed product data model, and a set of application examples illustrates the effectiveness of the model for specifying life-cycle-oriented technical services.

Implementing integrity constraints of EXPRESS in an active object-oriented database

A framework for engineering information exchange is proposed for an information-driven computer integrated manufacturing (CIM) system, using the ISO STEP EXPRESS specification language and an active object-oriented database. The framework allows both the engineering data and its integrity constraints specified using EXPRESS to be stored in the active object-oriented database. Using triggers for userdefined integrity constraints, the active object-oriented database enables application programs to share the engineering data without any concern about the integrity constraints. That is, integrity checking is performed by the database management system, not by individual application programs. Further, it can resolve the problem of engineering semantics loss, and integrate various existing computer aided engineering tools in a heterogeneous CIM environment. The translation framework is described along with appropriate translation examples. A prototype design system based on the framework and comparisons with ot...

An Extended Product Data Management System Supporting Personal Manufacturing Based on Connected Consumer 3D Printing Services

The low price around 1000 USD makes consumer 3D printers as a new additive manufacturing platform for the personal manufacturing where consumers can make and sell their own products. To allow the consumers to design and manufacture their products, not only economic 3D printers but also supporting information systems for their design and manufacturing are essential. This study suggests an extended product data management (PDM) system that can support both the design and manufacturing of personal products with consumer 3D printing services. This extended PDM system helps consumer designers use advanced PDM technologies for their design and connected 3D printing services with Internet of Things (IoT) technology for realization of their products. As a result, the proposed system supports the consumer designers a seamless integrated product development and manufacturing environment supported by PDM and consumer 3D printing services.

Developing an Introductory Training Course to PLM

Product Life cycle Management (PLM) is an indispensable tool for manufactures to develop competitive products in an efficient way. This enlarges the number of participants for product development who should understand PLM for their supporting activities. However, burdens for developing example products, maintaining complex PLM systems and training prerequisite skills for engineering tools such as CAD systems prohibit an efficient introductory course to PLM. This paper proposes a comprehensive introductory course to PLM that bases on general product development process. In addition, it enables participants to build their example products with familiar Lego blocks and to construct 3D CAD assembly models by using predefined 3D elements. The PLM system for the course provides an intuitive and simple user environment for participants to specify their parts lists, associated 3D CAD models, and product structure of example products. Experiences on a class of the course show it is a valid and efficient education and training method for the PLM introduction.