The provided content focuses on the importance of planning and control in building strategic relationships with major customers. It highlights the expertise required by sales teams to work with these customers, including mental strength, logical interpretation skills, and technical knowledge. The content also emphasizes the need for coordination between different business functions, such as marketing and product development, to develop a strong brand image. Additionally, it suggests opportunities for creating long-term value with major customers through operational excellence, product leadership, and customer intimacy. Furthermore, it discusses methods for reducing risks associated with major customers' products and services, including risk and control policies and limitations on product volume. The content also covers ways to evaluate the outcomes of activities, such as quality evaluation methods, and provides a plan for addressing any issues that may arise.