Control Systems Analysis (CSA, Inc.) was founded in 1985 to provide engineering and analytical services for critical control systems. Initially focusing its efforts on safety analysis, CSA expanded its expertise to provide engineering services in all areas of system development lifecycle activites. CSA is a small, privately owned engineering firm that uses its INTERLOCKS® modeling and simulation tool to perform systems engineering, safety analysis, ambiguity analysis, and development of e-learning content and fault isolation tools.