How to use Capabaility model to build agile and scaleble CRM

Let us say we need build New CRM with required capability and build this is agile fashion. How we are going to make use of capability for CRM to support.

Below are the high level capability - Level 0 for the CRM to support.

Level 0 capability further drilled down to Level 1 capability , where dark green represent primary function ,light green represent secondary function that new CRM to support.

how this will be used to drive agile iteration as below

level 1 capability---- epic

level1 capability drilled down to level2- which will be mapped as faatures