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    A project procurement model enabling competition by design concept by integrating performance-based assessment (PBA), process-based estimating (PBE), and cost network modeling (CNM) tools
    (Massey University, 2022) Yazicioglu, Ediz; Kanoglu, Alaattin
    Handling the costs of vast and complicated construction projects has become a task that is more challenging than it was previously. Existing cost and time estimation approaches significantly impact clients and construction firms when cost and timing projections deviate significantly. Developing concepts such as "competition by design" enforce the performance-based assessment (PBA) method that pushes designers of the building and its subsystems to select new solutions that promote national research and development (R&D) activities in developing countries. Yet, this strategy necessitates more sophisticated, integrated, and inventive solutions in the project procurement processes, as contractors submit their designs rather than the client providing a single, unique design. This strategy significantly benefits customers, designers, contractors, and society, but it is inapplicable unless supported by components that function as an integrated system. None of the research and models in the literature comprehensively solve the challenge outlined above. This study presents a procurement model that enables the "competition by design" idea to serve the needs of all stakeholders in the construction industry by merging conceptual and practical components and tools. Throughout the construction of the proposed model, a "systems approach" was utilized. First, the problem and its constituents were investigated using the top-down method, and then the model was synthesized using the bottom-up method. © 2022, Massey University. All rights reserved.
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    SIMURG_CITIES Conceptual Model: Multi-Dimensional and Multi-Layer Performance-Based Assessment of Urban Sustainability at the City Level
    (Acadlore Publishing House, 2025) Senkulak, Burcu Ulker; Kanoglu, Alaattin; Ozcevik, Ozlem
    The assessment of urban sustainability and the development of performance-based practical tools for achieving Sustainable Development Goals (SDGs) are key items for discussion on the public agenda. Despite the urgency of the issues, there is a noticeable lack of studies related to a comprehensive model that could holistically assess sustainability performance at the city level. To address this research gap, SIMURG_CITIES conceptual model, the sub-project of A Performance-based and Sustainability-oriented Integration Model Using Relational database architecture to increase Global competitiveness of the construction industry (SIMURG), introduces a system-based methodology to evaluate urban sustainability of different cities. SIMURG_CITIES adopts multiple city layers and their associated key performance indicator (KPI) sets within the built environment dimension of 3D Cartesian system architecture to offer new insights. The purpose of this paper is to develop conceptual models at paradigmatic/philosophical, organizational process, interoperability/integrational, and computational/assessment components, paving the way for practical applications with a relational database model. The model and its relationship with interrelated components are explored by an iterative systems approach using input-process-output-outcome-impact (IPO) model and the people-process-technology (PPT) methodology. This structure steers the integration of humane, procedural, and technological factors into urban sustainability assessment. In addition, the model could help individuals select ideal urban environments to align with their expectations and to enhance accountability, transparency, and legitimacy in the decision-making processes of public authorities. Through this study, a technology-based approach is found to be effective in assessing urban sustainability and a conceptual framework is established in the contexts of Society 5.0 and urban governance.