車用導航系統隨著電腦、通訊、消費性電子等相關產品技術的發展已不再只是純粹的導航用途，它更可和其他相關的通訊、資訊、娛樂等產品作結合。近年來已有通訊技術結合車用導航，提供駕駛人與乘客更多的行車資訊、休閒娛樂與個人化服務。車用導航系統如提供不適當的介面資訊會造成使用者操作上的困難，像是不適合的圖示設計與介面框架配置容易讓使用者產生混淆；多餘的附加功能服務加上不恰當的層級配置，也會讓駕駛人在尋找所需功能時花上更多的時間，並增加駕駛人的心理負荷。
　　本研究以市面上車用導航系統所提供之功能作現況需求調查，並運用階層式集群分析法得到功能項目所應歸屬的層級；再以模糊層級分析法獲得選單框架之設計因子；接著進行最佳功能圖示之評選與設計。由上述方法得到之需求度高的功能項目、功能項目分群規則、介面設計因子與最佳功能圖示特徵，將作為後續系統介面之建構。
　　本研究所建構之車用導航系統，提供開發人員在開發車用導航系統介面時的依據，輔助開發人員得以更有效率地開發車用導航系統介面，開發後的系統介面也能更符合使用者需求。

With the technological development of computer, communication, consumer electronics and related products, In-Vehicle Navigation Systems is no longer simply used for navigation; it can also integrate with other products related with communication, information, or entertainment. In recent years, In-Vehicle Navigation System has been integrated with communication technologies to provide drivers and passengers more driving information, entertainment and personal services. If In-Vehicle Navigation Systems provide inadequate user interface information, users may have difficulty on operation. For example, unsuitable icon and inappropriate framework configuration will confuse users; Redundant functional items and unsuited hierarchical configuration are not only waste drivers’ time looking for the functional items they need but also increase the driver's mental workload.
In this study, a market survey was used in order to know users’ requirements for functional items of In-Vehicle Navigation Systems. Then, a hierarchical cluster analysis was used to find out the right hierarchical configuration of functional items. In the following step, Fuzzy Analytic Hierarchy Process was used to get the design factors of framework configuration. At the end, the optimal functional icons were selected and designed. The high demand functional items, clustering rules of functional items, design factors of interface and the features of optimal functional icons gotten by the above methods will be used to build up the following system interfaces. The In-Vehicle Navigation System constructed in this study could be a reference for interface developers of In-Vehicle Navigation System. It could also assist developers build to a more efficient and user-friendly In-Vehicle Navigation System.

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