Why is temperature important in metrology? Temperature is extremely important in the field of metrology. From minor measurements to determine the length of a car part, to major measurement projects like building a piece of an aircraft, the effects of temperature on material must absolutely be understood and accounted for in every measurement. Depending on whether a measured material will be exposed to an increase or decrease in temperature, the material will experience some degree of expansion or shrinkage, respectively. When you are measuring the material you will use to build a part, or measuring a final product, you must account for variances in temperature that naturally occur between the lab, the workshop, and the real world. In a field such as metrology, exact precision is everything. If you are going to get precise measurements, you must fully understand the role of temperature.