https://doi.org/10.24928/2024/0106

Improving Reasons for Non-Compliance Documentation Using UAV on Construction Projects

Mauricio J. Toledo¹ & Brian E. Sánchez²

Abstract

Most Last Planner System® (LPS) research focused on finding the Reasons for Non-Compliance (RNC) and their origins come from indirect means such as perception surveys, therefore, registered RNC are based on opinions and not facts. This situation causes an incorrect categorization of RNC, and consequently, these RNC remain unsolved and they would probably happen again. The aim of this research is to create a formal registry of RNC on construction building projects during rough works for improving RNC documentation, using photos taken by an unmanned aerial vehicle (UAV). We performed 3 case studies: one using a traditional planning method, and two other projects using partial LPS implementation. We took aerial photos with the UAV to register unfulfilled Work Commitments (WC), their RNC and to propose a Corrective Action (CA) that would solve the RNC. This registry is supported by analyzing the RNC with an Ishikawa Diagram and using the 5 Why 2 How method (5W2H) to systematically propose a CA. We documented all this information in a “RNC Form” for each RNC detected. We took photos once a week for the project with a traditional planning method and twice a week for the projects with partial LPS implementation. We created 22 RNC Forms, which we shared with the project team professionals to receive feedback. The results are a methodology that accounts for a standardized process on how to carry out the UAV flights, photo taking and subsequently, how to document the RNC creating a RNC Form. This shows a more objective and visual record of the RNC, from which a process of continuous improvement is encouraged, by proposing a CA that solves the identified problem. The methodology and the RNC Form were validated with surveys on a Likert scale, from 1 (strongly disagree) to 4 (strongly agree). We interviewed 7 construction field professionals from the three projects. The composition of the RNC Form and the future use of the proposed methodology reached a score of 4.0 and 3.9 respectively; therefore, they were highly valued by the field professionals.

Keywords

Reasons for non-compliance, RNC, UAV, LPS, corrective action.

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Reference

Toledo, M. J. & Sánchez, B. E. 2024. Improving Reasons for Non-Compliance Documentation Using UAV on Construction Projects, Proceedings of the 32nd Annual Conference of the International Group for Lean Construction (IGLC 32) , 273-282. doi.org/10.24928/2024/0106

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