The Architecture Development Methodology describes the steps NEA will take to make use of the gathered data and design the governments to-be architecture. You can view more details about the Approach to NEA and Governance by clicking on the corresponding attached document Approach to NEA .
A basic explanation of NEA Metamodel as the following:
“NEA Metamodel is the analysis and construction of a set of standards of EA deliverables required form agencies to create and report for the sake of the government-wide EA success. It is also a depiction of the NEA repository structure that will be used to collect and analyze the collected deliverables from government agencies”.