There is a tremendous need to analyze system interoperability within Defense for both government and industry. Part of this challenge is the need for a metric that can be used as a common ontology and assess the state of interoperability in system’s development and acquisition. Previous research developments have created an Integration Readiness Level (IRL) that complements the well-established Technology Readiness Level (TRL) of the Department of Defense. This paper expands upon this work with the objective of presenting a verified and validated IRL and supporting guide of critical maturation criteria. We will review the foundations of this IRL, describe our development of a “guide” to support the IRLs, present the results of a survey to assess the criticality of decision criteria in the “guide,” and conclude with a discussion of the results and their implications to defense acquisition.
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