Project and operations management play an important role in enhancing efficiency in the development of large-scale technical systems. Although it is important, the strategic alignment of these fields is under-researched in the high-tech sectors where integration of engineering, procurement, and operations is critical in ensuring that they retain their competitive edge. This study will fill the gap by covering the roles of strategic integration in improving the project execution and the performance of operations. A mixed-methods approach was used, which included quantitative analysis of performance measures of surveyed organisations with qualitative case studies of large-scale projects in technical systems. The data used was obtained from 120 project managers and operations leads in various industries and analysed with regression predictor models and thematic coding. The results show that strategic integration has a significant positive effect on operational efficiency, with its major results being a 15 % cut in lead times, a 10 % rise in schedule compliance, and a 20 % decrease in rework. There is greater collaboration with organisations that were more integrated, faster decision-making, and better utilisation of resources. This paper shows that project management and operations management should be aligned to maximize performance in a complicated technical system. The findings can be used effectively by managers working in high-tech industries to understand that the creation of cross-functional cooperation and alignment of the goals of the projects with the objectives of operations may help to achieve significant efficiency improvements. Future studies ought to look into industry-oriented forms of integration and how digital tools can be used to enhance smooth coordination.
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