United States Department of Transportation
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Edition:Final Report
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Abstract:Construction inspection is a critical component of the quality assurance/quality control (QA/QC) program at the South Carolina Department of Transportation (SCDOT). A pressing challenge SCDOT has been facing is to balance the increasing demand to rebuild the statewide transportation systems with declining resources available for inspection. This project aims to address this critical issue by developing a risk-based inspection program that includes (1) the identification and assessment of risks associated with construction activities at SCDOT, (2) the development of inspection strategies that correspond to the level of risk, (3) the identification of quality requirements and inspection activities that are applicable to pay items, and (4) the design and implementation of a digital, risk-based inspection system. Two rounds of surveys were conducted to first identify and rank the risk factors and then assess the risks in aspects of likelihood, severity (cost, time, safety, and quality), and performance (short-/mid-/long-term). An aggregate risk score was calculated to categorize each pay item into high, medium, and low levels of risk. The inspection strategies (i.e., inspection priority and frequency and documentation frequency) were designed to correspond to the level of risk. The quality requirements and inspection activities for pay items were extracted from the corresponding sections in the standard specification, construction manual, supplementary specifications, supplementary technical specifications, and standard drawings. A database was designed to host the risk and inspection information. Tools were developed to assist project engineers and field inspectors in retrieving inspection activities in the digital form of checklists. The main deliverable is the resulting digital inspection system with tools. This system allows for the retrieval of all the related risk information, inspection strategy, and inspection activities/checklists for any given pay item. This system is expected to significantly enhance the efficiency of the construction inspection practice at SDCOT and reduce the workload for construction inspectors. The risk-based approach also enables SCDOT to focus on the most critical areas and can support the automation of construction inspection at SCDOT.
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