為了在競爭的環境中生存甚至是成長，企業可能會採取外包策略，請外部廠商負責處理非核心業務，而專注企業之有限資源於具有核心競爭力的活動。如何選擇外包廠商對於外包策略的執行成效有深切的影響，因為外包廠商會直接影響到企業價值鏈的最終產出結果。因此，本論文採取個案研究法對三家跨國公司進行深度訪談，以了解電子業之品牌廠商對於委外代工廠（製造服務供應商或研發製造服務供應商）的選擇程序與評估項目。 根據研究結果，本論文提出一套一般性的委外代工廠選擇程序。依照所考慮的委外代工廠種類之不同，該選擇程序建議五至六個階段（Market Research, General Survey, Specific Survey, Trial Run (optional), Verification Survey, and Decision Making），同時建議各階段應考慮的評估項目。本論文亦根據研究結果，對於欲建立委外代工廠選擇程序之品牌廠商以及委外代工廠提出相關建議。 / In order to survive and even to grow in the competitive environment, enterprises may adopt outsourcing strategy to focus on their core competency and to have external suppliers to handle the other activities. How to select a proper outsourcing supplier is very critical to the implementation of outsourcing strategy because outsourcing suppliers will affect the final outcome of the whole value chain very much. Therefore, this thesis studies in the electronic industry to understand the process and evaluation criteria of original equipment manufacturers (OEMs) to select contract manufacturers (which are electronic manufacturing services, EMS, providers or original design manufacturers, ODMs). Case study is applied as the research method and three multinational companies are in-depth interviewed for this study. Based on the research results, a general contract manufacturer selection process is proposed. This general process has five to six stages (Market Research, General Survey, Specific Survey, Trial Run (optional), Verification Survey, and Decision Making), depending on the kind of contract manufacturers under consideration. Corresponding evaluation criteria are also recommended for usage in each stage of the selection process. According to the research results, recommendations are made for OEMs which are planning to establish a contract manufacturer selection process and for contract manufacturers which are being surveyed.