產品資料的數位化是增進產品競爭力的重要基礎，然而產品資料數位化環境建立並不僅止於電腦輔助系統的導入，更重要的是產品資料的再使用以及產品資料的傳輸交換。技術團隊的研發工作以及反覆工程變更的結果，加深了產品生命週期中資料管理上的複雜度，盲目地導入電腦化系統的結果，只會造成產品生命週期中更多的資訊孤島，對於企業整體的技術能力並無多大的助益。然而，整合性的數位化環境必須透過產品生命週期中各個電腦化系統的資料傳輸與溝通才能實現，各系統間的資料溝通則須藉由產品資料表示標準的建立，方能使各個電腦化系統可以處理整個產品生命週期內所產生的資料，並且正確無誤地從事系統與系統間資料交換作業，進而促使產業內的資料再使用以及資訊共享。為達成此一目的，本研究以近年來愈形普及的國際產品資料表示與交換標準STEP為基礎，針對業界在工程變更過程所遭遇到的產品資料表示與交換的問題，發展出產品定義、產品結構、工程變更與評核等四個主要的資料模式，並利用物件導向式資料庫發展環境完成了產品資料管理(PDM)雛形系統主體以及雛形系統所需的中心資料庫，並且採行WWW技術完成網路傳輸介面與資訊整合利用的工作。其中以WWW網頁觀念設計使用者端的人機介面，降低系統導入過程中因各使用者資訊環境不同或成本考量所造成的導入困難。希望藉由本研究所提之STEP為基礎的整體資料模式構建概念，達成同步性與一致性產品研發的目的。

　　　　　Information and information management are very important in enabling enterprise integration. In order to manage the high volume of product data generated from iterative product R&D and to satisfy the high demand of data sharing among activities throughout product life cycle, information integration becomes very important in ensuring the consistency and correctness of product data throughout product life cycle. In addition to implement the necessary information technologies such as integrated database, network communication protocol, the product data model which is the basis of database establishment must be defined on the basis of an international product (model) data standard. Thus, all product data occurred in the product life cycle can be kept and, later, interpreted correctly in an integrated database. In this paper, an international standard for product data representation and exchange is introduced to be the core element of an world-wide product data management (PDM) pilot system. This research defines three main data models (e.g., product definition, product structure, engineering change and approval) using STEP-EXPRESS representation concept, and introduces the method of developing the PDM pilot system and integrated database using the object-oriented DBMS. To reduce the complexity of system implementation and improve the design of human-system interface, the word wide web (WWW) network technique is chosen to design the user-friendly interfaces for the PDM system. We express the STEP-based global data modeling concept for the realization of concurrent and consistent product data management.