Simon is a sales representative with McKesson who works with independent and chain drug stores to provide branded and private label over-the-counter medications, as well as a host of other supplies. Simon can match his customers' requirements to his broad product mix, and he also provides insights about what's selling in the marketplace so that store managers can make decisions about the allocation of shelf space. The approach is working, and Simon has been able to achieve his sales goals while also earning high customer satisfaction scores from his customer accounts. Which marketing management philosophy best applies to McKesson?