A key business reason for initiating a test improvement programme is to improve product reliability, which is directly related to the quality of the final product delivered to customers. Enhancing reliability through systematic testing can lead to fewer defects, higher customer satisfaction, and reduced costs associated with fixing issues post-release. This is often a priority in organisations where product quality and reliability are critical success factors, such as in industries like healthcare, automotive, or aviation.

The TMMi framework recognises that a focus on improving product quality, including reliability, is one of the major drivers for test process improvements. Testing processes that evolve and improve reliability provide value by reducing the risk of defects and ensuring that the software meets the defined quality criteria.