金融業界由於其業務上保守穩健的特性，習慣於採用傳統封閉式專屬主機系統。但由於業界普遍認為此一傳統遲早將隨著開放式技術的發展以及電子商務等新種業務的創新而有所改變。本研究之個案公司營運初期所建置之核心資訊系統—證券存託系統運作至今已達十五餘年，同樣也面臨相同之重建改造需求。 本研究的主要目的即是針對老舊資訊系統的更新，提供一個循序式的架構並尋找系統再造成功之關鍵因素，希望能使組織持續保有舊資訊系統存在的價值，並且在整合新的資訊科技技術後，結合新一代系統需求，為舊有的資訊系統賦予新生命。 本研究結論發現個案公司在進行系統轉換及重新開發前，應先進行企業流程再造(Business Process Reengineering / BPR)以確保新系統足以充分滿足公司未來業務的需求暨確保新系統之系統流程得與業務流程再造密切配合，以使新系統得以發揮最大的再造綜效。 Due to the characteristics of conservative and stable, the financial industries get accustomed to adopting traditional closed exclusive host computer system.However, the people of the financial industries think that this traditional closed exclusive host computer system will be changed by the development of opened-technique and innovation of electronic commerce, etc.. This study case is facing the same reconstruction and transforming the demand too. The main purpose of this research is directing against the renewal of the legacy information system, offer a structure of the type in a proper order and key factor of looking for the system to cause the work again, hope to enable organizing and protect value that legacy information system exists continuously, and after combining new information science and technology, accord with the system demand of new generation, give the new life for some legacy information systems. This research conclusion finds case Companies before being changed and develops again the system, should re-engineer to enterprise's procedure first (Business Process Reengineering / BPR) So as to ensure that the new system is enough to fully reflect the demand of the business in the future of company and guarantee that the automatic degree of the new system must re-engineer to close cooperation with the business procedure , so that the new system produce greatest giving a new lease of life to the comprehensive result .
