Accurate dimensional control surveys are vital for complex engineering and nuclear construction projects, ensuring components are built and aligned precisely to design tolerances. By detecting deviations early, they prevent costly rework, improve safety, and enhance productivity. Using advanced technologies such as precision total stations, laser scanning and 3D modelling, surveyors verify alignment, structural integrity, and compliance with nuclear standards. The resulting digital data supports BIM integration, lifecycle asset management, and informed decision-making. Ultimately, precise dimensional control reduces risk, safeguards quality, and guarantees that critical infrastructure and assemblies perform exactly as intended — essential for safe, efficient, and compliant project delivery