Measurement is the process of comparing the qualities of an object, such as size, shape, or volume, to an established standard in order to describe, analyze, or plan to modify the object. Precision in measurement includes the determination of the tolerances and dimensional controls necessary for the quality production of products. Accordingly, this core concept includes knowledge related to the appropriate application of (a) measurement tools and instruments (including linear, diameter, and angle measuring devices as well as indirect-reading/automated instruments), (b) performing precise measurements for the accurate layout of a production process, and (c) ensuring accuracy through appropriate unit analysis and engineering notation. This core concept is important to the practice of Material Processing as engineering professionals are required to apply appropriate measurement practices and tools in the design, fabrication, and communication of technological products and systems. Also, as measurements are provided in many different forms and inaccuracy in measurement calculations can cause major problems, engineering professionals need the mathematical skills to conduct unit conversions or analyses.