Titration is a common laboratory method of quantitative chemical analysis to determine the concentration of an plating bath Chemical to ensure is meets specification.

A coating thickness gauge is used to measure plating thickness build-up. Thickness is probably the most critical measurement in the coatings industry because of its impact on the coating process, holes go no go, quality, product reliability, cost and etc.

Product reliability testing is to evaluate a product's endurance under certain conditions and also help to predict future behavior of the part.
Testing is usually done during the development and manufacturing phases of product.