<![CDATA[The development of mobile grain dryers requires selecting a design concept that balances economic, environmental, and social performance. However, previous research has not extensively integrated these three dimensions of sustainability into the evaluation of mobile grain dryer concepts. This study aims to select the most sustainable hybrid mobile grain dryer concept through a fuzzy-based multi-criteria decision-making approach. The evaluation was conducted on three concepts: a vertical dryer, a trough dryer, and a rotary dryer. Fifteen criteria were formulated based on economic, environmental, and social dimensions. The assessment involved two academics and one paddy production practitioner through a focus group discussion. The Fuzzy Analytical Hierarchy Process was used to determine the criterion weights. In contrast, the Fuzzy Technique for Order Preference by Similarity to Ideal Solution was used to rank the alternatives. The results show that the economic dimension received the highest weight of 0.4490, followed by the environmental dimension at 0.3514 and the social dimension at 0.1996. Operating costs and energy consumption were the most dominant criteria, with a global weight of 0.1307. The trough dryer received the highest similarity coefficient of 0.8191, followed by the vertical dryer at 0.7139 and the rotary dryer at 0.6016. The trough dryer outperformed the others in terms of investment cost, energy efficiency, ease of maintenance, safety, ergonomics, and suitability for user capacity. Sensitivity analysis shows that these rankings remain stable under moderate changes in weightings. The rankings change only when productivity and drying capacity are assigned extreme weightings. These findings provide a measurable evaluation framework to support the development of sustainable grain dryers and design decision-making in the post-harvest sector.]]>
