高階主管資訊系統資訊需求分析之方法

Abstract

本論文之主要研究目的，是在建構一套有關高階主管資訊系統 (EIS) 資 訊需求分析之方法，期能提供給有意引進高階主管資訊系統者，於系統開 發過程之資訊需求分析階段有一較系統化之方法可供參考。EIS 為 80 年 代興起之資訊系統，目前文獻有關 EIS 之探討大多集中在 EIS 開發方法 論，對於資訊需求分析方法探討相對地較少，然而，資訊需求萃取乃 EIS 推行成功與否之關鍵因素，資訊需求分析也是整個系統開發過程的第一階 段工作，其重要性自是不言可喻。因此，本研究從萃取高階主管資訊需求 為出發點，提出一套系統化資訊需求分析方法。整個方法分為三階段：第 一階段為程序化萃取高階主管資訊需求，旨在利用各種不同方式擷取高階 主管真正之資訊需求；第二階段則是將階段一所萃取出之需求，以 IDEF0 之形式加以建構，藉此系統化工具確立需求規格，以減少開發人員彼此溝 通產生之誤解，並易於日後系統之擴充與維護；第三階段是參考 IDEF0 以 IDEF1X 建立 EIS 所需之邏輯資料庫，作為串接內部綱目與外部綱目 之橋樑。最後，為更清楚說明各階段所提之方法並驗證方法之可行性，本 研究以國內一家經營連鎖加盟之總公司為實作對象，依照研究之方法實際 執行之，並配合 EIS 開發方法論與 EIS 實體資料庫建構開發出範例 EIS 雛型。 The purpose of this thesis is to develop an approach to the information requirement analysis for the executive information system(EIS). It is hoped that this approach can provide those who intend to introduce EIS to their business with a more systematic procedure to which they are able to make reference. EIS developed in the '80s. There have been a great number of researches on the development methodology of EIS, but only a few academic studies have discussed the information requirement analysis for EIS. However, information requirement analysis not only plays a crucial role in the successful implementation of EIS, but also is the first step in developing the entire EIS system. Accordingly, while proposing a systematic approach to information requirement analysis, we start from the requirement acquisition. The proposed approach can be divided into three phases. In Phase I we apply a procedural method to extract the true information requirements from executives; in Phase II we adopt IDEF0, a systematic technique of setting the specification of requirements to eliminate all possible misunderstandings among developers and to construct those requirements acquired in Phase I; in the third phase, we use IDEF1X, a technique which is developed in accordance with IDEF0, to establish the logical databases of EIS as a linkage between internal and external schema.Finally, we give a case study of EIS for a chain store to detail this approach and test its feasibility. By adopting this proposed approach, applying the EIS development methodology, and establishing the EIS physical database, we develop a prototype system of EIS for that chain store.