Coffee is one of the most popular beverages in the world. This study examined and proposed improvement of coffee production performance involving farmers, factories, and entrepreneurs by using lean concepts and smart farming. Using data gathered from site visits, observation, and interviews, value stream mapping (VSM) was employed to recognize and classify activities in the coffee supply chain. Eliminate, Combine, Rearrange, and Simplify (ECRS) techniques were proposed to enhance supply chain performance. Those can help in improving and increasing the profitability of Thai coffee supply chain. This work focuses on the function of productivity improvement implementation in coffee production. The effects of productivity improvement implementation will be analyzed using a case study. In the future, farmers and factories can gain several benefits and become more reactive to the needs of the customer.