Purpose The complexity of projects has become a serious issue and obstacle in their successful completion. In order to overcome these complexities, it has become imperative to identify the relevant management competencies of project managers. The purpose of this paper is to address the problem of cost, time and scope in engineering infrastructure projects due to their complexities through management competencies. Design/methodology/approach In the first phase of the study, 32 experts were interviewed through semi-structured pre-tested questionnaire. In this phase, essential elements of complexities were identified initially. This was followed by finding required dimensions of competencies to counter these complexities and to acquire improved performance. In the final stage, required levels of competencies for specific elements of complexity were identified. In the second phase, 85 “project managers” were also approached to get feedback about their recently completed public sector engineering infrastructure projects in Pakistan. Findings The study identified additional dimensions, i.e. honesty, enthusiasm and dedication, in the case of competencies and adverse law and order situation, political instability, land issues, energy crisis and weak authorization of project managers in the case of complexities. Leadership, management skill, communication skill, effectiveness and result orientation were identified as top quality traits required. The study concluded that there is a significant impact of management competencies and complexities on project performance. Originality/value The study contributes to a better understanding of how to improve performance in complex engineering infrastructure projects through adopting management competencies. It also empirically illustrates the relations among project management competencies, complexities and project performance. Although the research is grounded on public sector infrastructure projects, its findings may also be helpful for practices in project management of other sectors.

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Strategic flexibility is deemed to be an important organizational capability for enhancing innovation and improving organizational performance (OP) in uncertain, turbulent, and ever-changing business environments. Many studies have investigated the impact of strategic flexibility on innovation and OP in various contexts and found that strategic flexibility enhances innovation and improves OP. Other studies have found negative association or no association between strategic flexibility and OP. Therefore, it is not much clear whether strategic flexibility improves OP directly or through innovation. Especially, the mediating role of innovation in the association between strategic flexibility and OP in engineering project-based organizations has not been fully grabbed in prior literature and Pakistan remained unexplored. This study has strived to examine the mediating role of innovation in the association between strategic flexibility and OP in this context. Drawing upon resource based and dynamic capability views, an explanatory model was developed and tested by applying PLS-SEM higher order component modeling approach using sample data from 184 organizations in Pakistan. The results revealed that strategic flexibility is positively associated with innovation and OP. Innovation is positively associated with OP. The association between strategic flexibility and OP is partially mediated by innovation. The study promotes academic rigor and provides a new theoretical model. Mangers, decision-makers, and policy-makers can utilize the results to update their plans to achieve sustainable OP. The other organizations in various countries operating under similar conditions can also take the advantage of this study.