The Plan-Do-Check (PDC) cycle stands as a fundamental framework for navigating quality control in multimillion-dollar construction projects, particularly as practiced by the U.S. Army Corps of Engineers (COE). Rooted in meticulous planning, deliberate execution, and rigorous validation, the PDC methodology ensures that every project phase aligns with established quality standards and stakeholder expectations. By iteratively refining processes, incorporating tools like Gantt Charts for critical path management, and emphasizing task-level validation alongside systemic functionality, the COE creates a dynamic, adaptive approach to quality assurance. This structured cycle not only mitigates risks but also fosters continuous improvement, driving success in delivering complex, high-value projects.