Planning of resources is a powerful tool in the field of supply chain management and control and in general. Global large-scale companies and enterprises have this implemented in their planning processes. Today, experts in the subject have found issues regarding the implementation of such tools in small- and medium-sized enterprises (SMEs). Therefore, this paper aims to develop an application for the methodology of continual improvement of processes, referred to as the Deming cycle or Plan–Do–Check–Act (PDCA), which adapts to continuous improvements of processes and products in SMEs. The methodology was modeled in a SME dedicated to manufacture and distribution of wine and products (wine and Pisco). The model was simulated through a simulation software, obtaining results of improvement regarding problems like break of stock, taking into account the satisfaction of the client, productivity in the delivery, and shipment time.