Dimensional metrology is the science of measuring physical dimensions and geometrical characteristics of objects. It ensures that parts and products meet specified tolerances and standards, which is crucial in manufacturing and engineering. Techniques used in dimensional metrology include the use of tools like calipers, micrometers, and coordinate measuring machines (CMMs). This field plays a vital role in quality control and assurance, helping to maintain consistency and precision in production processes. By accurately measuring dimensions, industries can improve product performance, reduce waste, and enhance safety. Dimensional metrology is essential in sectors such as aerospace, automotive, and electronics.