In engineering building materials, residual stresses are both a challenge and an opportunity. When properly managed, they can have very positive impacts, enhancing the performance and reliability of products. However, when neglected, they can indeed have disastrous consequences. A fresh evaluation of conventional and contemporary measuring methods is desperately needed as concerns regarding the performance and dependability of products grow. Selecting the most valuable and efficient measuring technique for a particular application is essential to success. The content in Practical Residual Stress Measurement Methods gives the reader the knowledge they need to comprehend important residual stress concepts and make well-informed technical judgments regarding the best measurement approach. Written by invited professionals, each chapter is organised practically and focused, with subsections covering the measurement concept, residual stress evaluation, practical measuring techniques, sample applications, references, and more reading. This chapter provides a comprehensive overview of residual stress in mechanical coatings, discussing its nature, causes, measurement techniques, effects, mitigation strategies, and applications. It highlights the importance of understanding and controlling residual stress to optimise coating performance and reliability in various industries.