Doctoral Thesis / Dissertation from the year 2022 in the subject Business economics - Business Management, Corporate Governance, , language: English, abstract: The purpose of the study was to gain broader understanding of project complexity, how these complexities affects project delivery time and the tools and measures used in scheduling projects. The specific aspects explored were the challenges associated with complex projects, practices used in scheduling projects, and the relationship existing between project complexity and project delivery time. The study utilized both a positivist and social constructionist perspective that utilized the Modified Delphi technique. Accordingly, the epistemological motive underlying the Modified Delphi method chosen under the research favors both the positivist and social constructionist perspective. In accordance with the positivist design, the researcher is seen as an objective and uninvolved observer. Three rounds of questions would be asked of the participants. There would be initial pre-selection criteria which would seek to identify the level of expertise of the participants in relation to the research problem under consideration. After the selection of the panel, the three rounds of questions, comprised of qualitative and quantitative questions, were asked sequentially. Participants selected for the study could collude outside of the study, especially when they were from the same department. To minimize this problem, personal contact between the respective participants was not permitted and their identity was not disclosed with other participants. In addition, some terms may have a different interpretation, which could influence the ability of the respondents to give a fair assessment of the problems. Based on this, the terms used in the study focused on the technical jargons used within the field of project management.