We made significant changes to the design of a Thermostatic Mixing Valve produced by a well known UK manufacturer. The valve was designed to comply with the requirements of the anti-scalding standard D08 and the domestic standards BS EN 1111 and 1287.The project was behind schedule due to the need to produce a consistent quality of product in the initial pre-production batches.RAH Consultancy was able to study pre-production samples under test. Following our audit we recommended design improvements, which once implemented, resulted in a successful, compliant, working product.RAH's input returned the project to schedule.