Improvements in production systems that use the lean manufacturing approach known as “Lean” have the objective of eliminating or reducing waste or process inefficiencies (muda). This approach is increasingly adopted by different industrial sectors, including agriculture. Although Lean improvements are traditionally applied to existing processes from cultivation to distribution, opportunities to intervene in processing wastes (losses) are left aside. This article presents a methodological approach framed in five Lean principles, made up of six activities aimed at the design of new processes that make use of the losses generated by harvesting and agricultural transformation. The methodological approach is applied in a Colombian coffee farm where parchment coffee transformation processes are developed. A parallel losses composting process is designed that transforms defective, green, ov...