PurposeProject complexity has been comprehensively investigated over the last two decades, resulting in many descriptive frameworks and models. The common layout is a multidimensional construct. While the perception of the complexity of projects is essential for a managerial approach, only scant research has been conducted into how practitioners perceive project complexity. The purpose of the paper is to fill this gap.Design/methodology/approachThis paper is a quantitative study based on a large survey among managers of projects with more than 1,000 participants. The questionnaire is designed based on a review of research literature on project complexity.FindingsThe findings indicate that practitioners' mental models are concentrated on only a few dimensions of the many found in descriptive models. Further, the findings indicate that the mental models are much influenced by the project role of the perceiver and less so by the type of project and sector.Originality/valueThis paper discusses the differentiation of concepts of perceived project complexity and provides a framework for a survey of the topic. The contribution of the paper is an increased understanding of practitioners' perceptions of project complexity as a concept very different from the descriptive frameworks that have been the focal point for research in project complexity thus far. The project complexity might be in the eye of the beholder; however, the findings indicate that the eyes are very much influenced by the project role of the beholder.

PurposeProject complexity is becoming increasingly challenging for project managers. Much valuable research has been done on the concept of project complexity. The research reported in this paper aims to provide a new means (the “Complexity Navigation Window”) and guiding principles for the navigation of project complexity in practice.Design/methodology/approachThis paper applied action design research (a methodology for design science research) to design and evaluate the Complexity Navigation Window (CNW), which will serve as a representation of project complexity as a key component of the user interface for a decision support system (DSS) for managing project complexity.FindingsFormative evaluations of the CNW by 16 project management practitioners indicated that the artefact is relevant, comprehensible and heading in a promising direction to guide decision-making. The evaluation also highlighted project managers' difficulty in using the (conceptual) representation by itself to assess a project's current situation accurately, which in turn limits their ability to understand a project's current complexity and decide an appropriate course of strategy. A conceptual framework by itself is insufficient. This finding motivates further research to develop and evaluate a DSS that would partially automate the assessment process (by surveying stakeholders and automatically assessing and representing project complexity according to the CNW), which should aid in increasing the accuracy (and timeliness) of project complexity assessments and contribute to appropriate strategy formulation and timely revision.Practical implicationsThe formative evaluation of the CNW indicates relevance for practitioners and the further features of the DSS may still yield even higher perceived utility from the full artefact.Originality/valueThe paper provides improved understanding of practitioners' perceptions of project complexity and ability to assess it for a given project. The paper describes the design of a new visualisation for navigating and managing complexity. The paper further presents four strategies for managing project complexity. Finally, the paper also provides a methodological discussion on the potential of ADR in advancing project management research.

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PurposeProject complexity has been researched much. The majority of publication is searching for law-like relations or development of descriptive frameworks. More prescriptive knowledge is needed to guide the project managers in navigating the project complexity in project managers' pursuit of success. Identifying the complexities of a given project is a real-world problem for project managers (Mikkelsen et al., 2021). The purpose of the paper is to investigate the research of prescriptive knowledge on the management of project complexity.Design/methodology/approachBased on a longitudinally case study, this paper uses Action Design Research (Sein et al., 2011) (ADR) to research the management of project stakeholder complexity. ADR is a variation of action research (AR) with inspiration from design science (Hevner et al., 2004) where an artifact is designed to solve a real-world problem. In this case study, an information system was configured in collaboration with the project managers of the recipient organization.FindingsThe findings from the research project are presented using the affordance theory (Gibson, 1977) as a framing concept and give special attention the affordance perception (Pozzi et al., 2014). Among the project managers, who were very engaged in the co-design, the majority refrained from activating the information system and got the outside view from the stakeholders. Interviews afterward identified “fear of bad project ratings from the stakeholder” as the main course of resistance to deploy the surveying information system.Originality/valueThe paper contributes on two levels. The paper presents a novel approach to researching project complexity based on engaging the stakeholder in generating a common perception of the ongoing state of the projects. The paper also contributes insights into reasons for reluctance on the part of the participants (the project managers) of the recipient organization and hereby adds to the understanding of the organizational change aspect of AR in the research of project management. The paper concludes with the identified benefits of using ADR in research on project complexity management and gives recommendations for future research.