This core concept refers to the characteristics that you identify for the new solution through elicitation, collaboration, and communication activities. 

Let's look at an example to bring this concept of solution into the real world:

During all the elicitation and collaboration activities you perform with the finance teams, you are developing a clearer view of the characteristics required of a new solution for the company.

This example illustrates how the core concept of the solution is implemented during the Elicitation and Collaboration Knowledge Area with a focus on eliciting solution requirements, which will meet the business need.