What is the marketing mix and why must its elements work together?

"11.3 Developing a Marketing Mix 3. What is the marketing mix? Once a firm has defined its target market and identified its competitive advantage, it can create the marketing mix, which is based on the 5Ps discussed earlier, that brings a specific group of consumers a product with superior value. Every target market requires a unique marketing mix to satisfy the needs of the target customers and meet the firm’s goals. A strategy must be constructed for each of the 5Ps, and all strategies must be blended with the strategies of the other elements. Thus, the marketing mix is only as good as its weakest part. For example, an excellent product with a poor distribution system could be doomed to failure. An excellent product with an excellent distribution system but an inappropriate price is also doomed to failure. A successful marketing mix requires careful tailoring. For instance, at first glance you might think that McDonald’s and Wendy’s have roughly the same marketing mix. After all, they are both in the fast-food business. But McDonald’s targets parents with young children through Ronald McDonald, heavily promoted children’s Happy Meals, and in-store playgrounds. Wendy’s is targeted to a more adult crowd. Wendy’s has no playgrounds, but it does have flat-screen TVs, digital menu boards, and comfy leather seating by a fireplace in many stores (a more adult atmosphere), and it has expanded its menu to include more items for adult tastes."