Dimensional tolerancing is a method used in engineering and manufacturing to specify the allowable variations in the size and shape of a part. It ensures that components fit together correctly and function as intended, even if there are slight differences in their dimensions. This practice is crucial for maintaining quality and consistency in production. The system uses symbols and numerical values to define tolerances, which can include limits on length, width, height, and angles. By applying dimensional tolerancing, manufacturers can reduce waste, improve efficiency, and ensure that products meet the required standards, ultimately leading to better performance and reliability in the final product.