A content hierarchy helps visualize required content for the performance. A content hierarchy breaks down a performance into its content (subject matter Knowledge, Skills, Attitudes) to identify where gaps exists and what learners will be required to learn to perform well (close the identified gap).

Through analysis, I identified: 

TOP-LEVEL activities (the end goal of what learners will be able to do).

SECOND-LEVEL activities (the skills required to accomplish top-level activities).

THIRD-LEVEL activities (the final attitudes and minor skills that make up second-level activities).