This comprehension-level course builds upon the foundational knowledge from SYS-169 Introduction to Human Systems Integration (HSI). It will help students recognize the role of HSI as part of the systems engineering process in the requirements, acquisitions, and sustainment lifecycle phases. Students will understand how HSI is woven throughout the entire lifecycle and where to find technical assistance in order to help requirements developers, acquisitions professionals, and sustainment personnel make timely, effective, and efficient technical and programmatic decisions.