乾燥作業或者代烘績效之提升，讓米穀的風味與品級大幅提升，過去類此的農具 使用，難測得其折舊耗損程度，致後續使用行為之研究，亦裹足不前。本研究首先佈 建得此類農機易辨識的使用行為，做概念之架構指引，並採用Box-Cox函數之指數形 式做量化驗證，發現米穀烘焙機具在使用的第一年，其使用效率就僅剩下52.12%，至 第三年後，方回穩至平滑下降的折耗型態。本研究經參酌各類農機可能由二手市場購 置使用與購買國別不同之後，最終建構得適區米穀烘焙機具之永續使用模圖，可提供 給自營作業或代耕中心，於擬定合宜綠色環境管理的參考。

Sustainable usage behavior is a key requirement for implementing rice-drying enterprises. This paper examines the conceptual depreciation frameworks of the Ilan rice-drying machine in usage, by the (perceived) resale price data of farm machines adjusted with maintenance costs as well as capacity utilization. After the built cognitive framework, the paper begins by employing the adjusted index to empirically verify the approximated efficiency loss in rice-drying farming process while the Ilan replacement investment has been installed. Specifically, the Box-Cox model is used to explicitly derive the relative productive efficiency by the all vintage in usage. Comparable to the other farming machines with moderate second-hand market, the rice-drying usage is confined in the accelerating deterioration and, therefore, the major usage strategy should reconstruct the early years’ green cognition and take superior technology-drying ecodesign into account.