我國軍用飛機所裝用之電子器材，不斷面臨著內部零組件停產等商源消失問題，造成器材可能無法透過正常供售管道取得，並衍生裝用後相關品質及可靠度(reliability)疑慮，由於軍方在採購後時常耗費人力與時間去處理履約爭議或洽賠遭拒絕等狀況，本研究以機載無線電(aircraft radio transceiver)為例，運用可靠度工程中有關試驗評估(testing and estimation)、抽樣計畫(sampling plan)、可用度(availability)等理論，針對軍用電子器材採購作業流程進行探討，目的是為了呈現更客觀之驗證與確認(verification & validation)結果。
研究中以逐次試驗(sequential test)抽樣計畫為核心，其為買賣雙方用來衡量是否簽約生產內容與後續履約驗收相符之主要方法，以期降低電子器材之平均失效間隔時間(MTBF)值較高時所造成試驗時間過長的影響。再加上透過計算所得之穩態(steady-state)可用度及穩態期間所需時間，能進一步觀察可維修系統於修復後之可用度，是否維持在預期正常運作水平之上，以確認維修更換器材的實際可靠度與試驗評估結果之差異。
最後綜合上述的可靠度理論，設計出電子器材採購的驗證與確認(verification & validation)模式檢核表，需求單位可由本研究歸納之3類採購流程，選擇適用之模式導入採購合約，使得採購作業更為客觀、準確及完備，對於提升電子器材的可靠度，降低人力、物力與額外維修整備的損耗等，應有相當之助益。

The electronic units used in Taiwan's military aircraft constantly face diminishing manufacturing sources and material shortages for repair components/parts, which may not be available through normal supply channels, resulting in quality and reliability problems after installation. The military sector usually spends human resources dealing with contract performance/assurance disputes or refusing compensation after procurement. Therefore, this research takes the Airborne Radio Transceiver product as an example and uses the testing and estimation, sampling plan, and availability methods in reliability engineering to study the existing procurement process of military electronic units to recommend adequate methods for acceptable process verification and validation.
The Sequential Test sampling plan is the primary method for buyers and sellers to evaluate whether to approve a contract for production and subsequent performance acceptance. It can reduce long test time when the mean time between failure (MTBF) values is high. In addition, calculating the steady-state availability makes it possible to observe whether the repaired system's availability is above the designated operation requirement level. And the acceptable difference between the actual reliability of the replaced components and the evaluation results is confirmed.
Finally, design a verification and validation model checklist for the refurbished electronic units' procurement processes. It can adopt an appropriate model for the content of the procurement contract based on the three types of procurement processes studied in this research. We can conclude that the currently reported verification and validation model can improve the reliability of the procured refurbished airborne electronic types of equipment and reduce the loss of human resources costs on additional maintenance and repairs.

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