What is the way to define the customer’s value in marketing?

As we can define the customer value like the difference among the values the customer gains by owning and using a product and the cost of acquiring the product. And therefore customer satisfaction is the extent to that a product’s perceived performance matches buyer’s expectations. When the product’s performance falls short of hopes, then the buyer is dissatisfied. When the performance matches or exceeds expectations, in that case the buyer is delighted or satisfied.