臺灣博碩士論文加值系統

決策指引(Decisional Guidance)能幫助決策者建構和執行決策過程，並且增進決策績效，促進決策支援系統(Decision Support Systems)的使用效能。從過去的研究中發現不同模式或不同形式的決策指引對使用者的決策績效產生不同的影響。從過去文獻中得知，當使用者面對多樣性，甚至是衝突性資訊任務的時候，在使用者的決策過程會產生困惑。在模糊性任務的情境下制定決策，對決策者會造成一些挑戰和困難。因此，在決策支援系統的使用環境中，不同任務模糊性情境下搭配不同類型的決策指引如何支援系統使用者，是一項重要的議題。
本研究參考媒體豐富理論(Media Richness Theory, MRT)之觀點，以媒體豐富理論中的回饋(feedback)和多樣性線索(cue multiplicity)，結合決策指引的模式與形式，探討高模糊性和低模糊性任務情境下分別搭配何種決策指引，以支援決策者達到更好的決策績效。
本研究採用實驗室實驗法來觀察高模糊性和低模糊性任務搭配不同類型的決策指引所產生的績效，以及找出何種類型的決策指引最適合高模糊性和低模糊性任務。本研究中衡量決策績效的四個應變數：決策品質、使用者滿意度、使用者學習、決策效率。研究結果顯示二因子交互作用在使用者滿意度和決策效率方面有顯著影響。
研究結論為以下四點：(1)高模糊性任務搭配資訊型指引(informative guidance)的決策指引有較好的使用者滿意度。(2)低模糊性任務搭配建議型指引(suggestive guidance)的決策指引有較好的使用者滿意度。(3)高模糊性任務搭配動態式指引(dynamic guidance)的決策指引有較好的決策效率。(4)低模糊性任務搭配先定式指引(predefined guidance)的決策指引有較好的決策效率。

The purpose of decisional guidance is to support DSS user’s problem structuring and execution process, as well as to improve performance. In literature review of decision making difficulties, high equivocal tasks are serious challenges for DSS users. Hence, when facing high equivocal tasks, it is a critical issue to improve decision making performance through an appropriate decisional guidance. This study attempts to understand the impact of task equivocality on decisional guidance effectiveness.
Based on media richness theory (MRT), this study proposes a research model to explain the impact of task equivocality on decisional guidance effectiveness. A laboratory experiment was conducted to empirically test those hypotheses. The results indicate that significant interaction effects of the two factors (i.e., forms of the decisional guidance and task equivocality, modes of the decisional guidance and task equivocality) on user satisfaction and decision making efficiency. Specifically, the findings could be summarized that: (1) Use of informative guidance will lead to better user satisfaction for high equivocal tasks while use of suggestive guidance will lead to better user satisfaction for low equivocal tasks; (2) Use of dynamic guidance will lead to better decision making efficiency for high equivocal tasks while use of predefined guidance will lead to better decision making efficiency for low equivocal tasks. Finally, the academic and managerial implications are also provided.

第一章 緖論
第一節 研究背景與動機
第二節 研究目的與問題
第三節 研究貢獻
第四節 研究流程
第二章 文獻探討
第一節 決策指引
第二節 媒體豐富理論
第三節 任務模糊性
第四節 決策績效
第三章 研究架構與假說
第一節 研究架構
第二節 研究假說
第四章 研究方法
第一節 研究變數衡量
第二節 實驗設計
第五章 資料分析方法
第一節 敘述統計
第二節 信度與效度分析
第三節 假說檢定：以多變量變異數分析方法
第四節 假說檢定：以多變量共變數分析方法
第五節 結果說明與討論
第六章 結論與建議
第一節 研究結論
第二節 研究限制
第三節 未來研究方向
參考文獻
附錄一 個人背景資料問卷
附錄二 實驗後問卷
附錄三 任務模糊性問卷
附錄四 實驗系統
附錄五 任務說明書

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