隨著電子廢棄物的快速產生，有限的掩埋場已不敷使用，因此垃圾丟棄前需移除有毒物質、取出有用零件，並回收有用原料，進而達到垃圾減量的目標並符合國際法規（如WEEE, RoHS等）的要求。回收前進行拆解的需求也促使「設計易拆解產品」的概念生成。

為拆解而設計意指在「設計階段」便考慮未來拆解工作的進行。設計工作經常面臨資源有限的問題，若欲改善產品的易拆解性，必須針對重要的項目開始著手。設計者依經驗與易拆解設計的原則提出再設計產品的作法，卻無法得知何者對改善易拆解性最有幫助。因此本研究的目的在發展一個可提供「設計條件優先順序」的結構化方法，以作為設計師在設計階段的決策輔助模式。

研究方法以易拆解性（Disassemblability）為主要概念，發展一套排序設計條件的流程，藉由專家意見整合「易拆解性的評估指標、設計條件發展與設計條件的排序」成為一結構化的方法。最後階段所得之設計條件的優先順序，為設計師選擇執行細部設計項目的決策依據，藉此方法選出能改善最多的設計條件。

個案研究以手機為例進行此方法的應用，先以分析網路程序法決定易拆解性指標的權重，再藉由德菲法發展設計條件，最後用品質機能展開結合指標與設計條件，在此逐步整合的過程中，計算得到設計條件的權重值及其優先性。

With the e-waste generating rapidly, the capacity of landfill sites are not enough. Therefore, there’s a growing demand to dispose of old products in a constructive way by removing hazardous materials, retrieving reusable components, and recycling, thereby to reduce the e-waste and meet the international regulations about disposal of waste electrical and electronic equipment.

Design for disassembly means to consider the disassembly job while in design stage. With limited resources, designers have to start with critical design requirements in order to improve disassemblability of products. However, there is no information about which approach they propose is most helpful to disaseemblability when redesigning. The objective of this study is to develop a structured method which can provide the priorities of design requirements for designers and help them to make decisions in design stage.

The methodology integrates criteria of disassemblability, design requirements, and priorities through advices from experts. Designers can choose the critical design requirements according to the priorities, and then work on them in detail.

Mobile phone is taken as an example of the application. First, Analytic Network Process is used to determine the weights of criteria. Then, the Delphi method is applied to develop design requirements. Finally, Quality Function Deployment combines the outputs from foregoing steps. Through the process of integration, calculates the weights of the design requirements and their priorities.

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