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There is an increasing application of Systems Engineering in the Norwegian construction industry. This paper investigates the effects of a Systems Engineering approach on project management performance, prerequisites for success, and which elements contribute to effectiveness from a technical contractor perspective. First, we find a positive perception of Systems Engineering's effect on time, cost, and quality. Second, we provide and rank a list of 12 prerequisites for success. Third, we quantify the perceived importance of five elements of the systems engineering process. Finally, we find a disconnect between what seems to be essential processes and prerequisites and what gets done in practice. To improve Systems Engineering performance, we recommend improving Systems Engineering competence and capabilities, increasing the formality of requirements analysis and documentation, and front-loading the effort and allocation of resources in projects.While the V-model conveys relative linearity in the process, it is, in fact, much more iterative. The Department of Defense (2001) elaborates on the top-down design process. The process is looping through the steps of requirements analysis, functional analysis, and design synthesis. Methods and techniques summarized as system analysis and control are used to track decisions and requirements, maintain technical baselines, manage interfaces, risks, cost, schedule, technical performance, and verify that requirements are met (Department of Defense, 2001). The output of the process is a de-