Abstract

Inefficiencies in paperwork, time management, rework, and design processes during the design and planning phases significantly impact construction projects, leading to increased waste and reduced project efficiency. This research has investigated how these factors contribute to waste, focusing on errors, omissions/lack of information and poor-quality documentation, delays in decision-making, lack of clear communications and design-related issues that affect overall project outcomes. Employing a mixed-methods approach, the study has combined primary data from surveys with construction professionals, project managers, and designers, alongside secondary data from industry reports and academic literature on construction waste and project management. The research has identified critical inefficiencies in the design and planning phases that lead to increased waste, such as inaccuracies in project documentation, extended approval times, lack of waste minimization considerations in the design phase and frequent design revisions. These inefficiencies are expected to cause cascading effects throughout the project lifecycle, including unnecessary material handling, rework, and delays. The study has also explored opportunities for improvement by examining enhanced documentation practices, better time management, and more effective design coordination. Additionally, it investigated the benefits of adopting digital tools for accurate documentation, implementing more efficient scheduling techniques, and improving design-for-construction approaches to minimize rework. Therefore, the primary goal of this research was to investigate and identify inefficiencies in order to streamline the design and planning phases, reduce waste, and enhance project efficiency, thereby contributing to more sustainable and cost-effective construction practices in New Zealand.

Keywords:
Construction waste, Time management, Project documentation. Rework in construction, Design inefficiencies

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