In what part of the production process is metrology most important for cost? As it relates to cost, metrology is important in all parts of the production process for a business. Starting from the design phase, the science of measurement ought to play a major role in product creation and development. With a well-designed product, costs will be lowered with fewer mistakes and a better final version. During the building stage, metrology is of course important in making sure that each product is identically measured and cut. The higher quality the metrology tools and devices, the higher quality the outcome will be. Finally, even after a product is in a consumer’s hands, metrology matters. Customer satisfaction and the likelihood that they will return to your company relies in the ability for metrology to have done its job.