Quality is the degree to which an object satisfies a specified set of inherent characteristics with a set of requirements. Mechanical quality control is a set of mechanical checks that helps to detect the discontinuities present in the materials or to determine the certain mechanical properties such as strength, toughness, hardness etc. There are two kinds of testing – Destructive testing (DT) and Non Destructive Testing (NDT)

The purpose of destructive testing is ultimately to understand how a material will react to extreme stress or loads. Knowing how much stress a material can withstand before complete failure is critical when planning on using that material in engineering design, manufacturing processes, and product design. Many of the destructive tests are performed in a lab using specialized equipment. Industries that use destructive testing include: Aerospace, Automotive, Construction, Defense, Fabrication, Infrastructure, Manufacturing, Oil & Gas, Petrochemical etc. Destructive tests causes irreversible damage on the tested item and those parts cannot be reused in regular operations.

Non Destructive Testing (NDT) is used to inspect and evaluate materials, components, or assemblies without destroying their serviceability and they do not alter any of the properties of the tested product. NDT is used to test the quality of components and machine condition before or during their active use. A wide range of industries that use NDT which include: Aerospace, Automotive, Manufacturing Medical devices, Military and defense Marine industries, Power generation ,Petrochemical industry etc. some common NDT methods are Visual testing, Liquid penetrant Testing, Magnetic Particle Testing, Ultrasonic Testing and Radiography Testing. NDT has a vast scope and its application extends to almost all the manufacturing industries.