![]() ![]() ![]() The dimensional quality control practices that are prevalent in today's industry do not only provide room for random errors associated with manual measurements, but also exploit two of the most valuable assets of a construction project: time and labor. The consequences of improper dimensional quality control measures are adverse effects on the aesthetics of the elements, and in severe cases, the structural strength of the element. The failure of constructed elements to fall within the specified limits of tolerances maybe the result of unsatisfactory level of precision applied during construction or the inability to clearly interpret the information provided in the specifications. ![]() The findings of this study provide a pivotal basis for construction practitioners to develop effective solutions for tolerance management whereby tolerance risks can be identified and mitigated in a prescient manner, which can result in a significant amount of savings.ĭuring the life cycle of a construction project, there are instances where the geometrical dimensions of precast concrete elements fail to meet specified tolerances. ![]() The contribution of this paper to knowledge in engineering management is fourfold: (1) the limitations of prior studies on causes of tolerance issues are revealed, (2) the empirical studies led to not only verifying and refining the causes collected from the literature by considering them in the context of the identified tolerance issues, but also finding new causes in the context of tolerance management when compared to literature, (3) the identified causes provide insight into reasons behind the recurrence of tolerance issues across the industry, and (4) it investigates the causes of tolerance issues while balancing managerial and engineering views. Having triangulated the findings, a list of eighteen potential causes were derived for the eleven observed tolerance issues in two case study projects. The empirical data is collected through direct observations, group interviews, semi-structured interviews and document reviews. This research uses a case study approach. The aim of the research presented in this paper is to identify the potential causes of tolerance issues in construction based on a literature review and empirical studies. To enable the development of widely acceptable solutions for the perennial challenge of tolerance management, a more in-depth understanding of causes of tolerance issues should be established. Defects associated with dimensional and geometric variations (tolerance issues) are amongst the most costly and recurring defects in construction projects, yet the identification and mitigation of the causes of tolerance issues appear to be lacking in the construction industry. ![]()
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