the only things of real importance are the first three levels since:
90% of Enterprises need help moving from level 1 to level 2 or
level 2 to level 3.
Level 4 will never be fully attained - it is largely aspirational.
Attaining level 4 would require 80% of the effort for only 20% of
In terms of
Measures, a Maturity Model should also distinguish between what is required
(definition) as well as how it is used (operation).