Summary and conclusions
Following the research, it is plausible to conclude that the development of sustainable coffee in Buon Ma Thuot City in particular, and in Vietnam in general, offers many opportunities but still encounters some difficulties that need to be overcome. By means of Chi-square analysis, the positive impacts of sustainable coffee programs on the sustainable coffee supply chain management are confirmed. Certified farmers also perform higher levels of adoption of improved production practices. Environmental management, social attainment and corporate social responsibility are becoming the main concern of coffee processing companies but there is limited evidence of large-scale support from them to local farmers. Thus, the success of the improvement depends mainly on cooperation among stakeholders, both in the public and private sectors. They have to coordinate closely to improve current farming practices, and then manage the supply chain network as well as reverse logistic issues along with consider strategies to support sustainable development. The government should also consider more effective policies and laws to encourage investment in sustainable coffee production, and expand the market for this product. Besides, the premium price for certified coffee is known as approximately 10–20% higher than the normal price. A positive relationship between certification ownership and higher economic profit is shown in the research; however, future researches should measure and prove the financial benefits for farmers to persuade them to join sustainable programs. Another contribution that future research should examine is the productivity benefit when farmers change from planting normal coffee to certified coffee. Researchers should provide them with guidance to help them manage the quality of their coffee farms. Finally, the logistic regression model is suggested to help government and sustainable coffee programs choose farmers with proper conditions in order to achieve more success. It is confirmed that sustainable coffee schemes should be enhanced thanks to their benefits. However, there are some limitations of this study that future research should consider. Due to the limitations of time and experience, the researchers were unable to study a larger sample, which could generate a more accurate result. In addition, the research did not measure the financial impacts of the sustainable coffee program.