The dissertation explores the importance of senior management competence in formulating and executing effective strategies for business success. In this context, strategy aims to position the company to achieve competitive advantage, focusing on different approaches to add value to the customer. The adoption of Supply Chain Management (SCM) by companies aims to reduce costs, increase sales, and establish a strong relationship with the consumer. The Sales and Operations Planning (SandOP) methodology is presented as beneficial for ensuring integrated, organized, and productive planning, optimizing the synchrony between supply and demand. The Lean approach is highlighted as a philosophy that transcends a set of tools, influencing organizational culture. The proposed case study analyzes the impact of implementing the SandOP process on the performance of an oil and gas sector company, addressing tangible and intangible issues such as influence on the work environment, customer satisfaction, and modifications in production scheduling due to the visibility generated by SandOP. The research results were based on the analysis of leadership interviews that showed great consistency in the perception of the influence of the SandOP methodology on company management through several citations from categories related to the impacts of the process on the business management. The research also analyzed the evolution key performance indexes to seek practical evidence of potential changes after the implementation of SandOP.