The sixteen questions are not independent. You cannot check without knowing what correct means, you cannot judge coverage without checks, and you cannot sign off without a plan. The map shows which questions feed which.
Parts 0 to 3 define the target: what correct means, the kinds of failure, the oracle, and whether the design can be steered and observed at all.
Parts 4 to 7 are the techniques: stimulus, checking, coverage, and proof.
Parts 8 to 11 decide where and at what scale: levels, plans, platforms, silicon.
Parts 12 to 15 close the loop: economics, debug, sign-off and special domains.