RAH had been requested to help in the completion of a design project for a new thermostatic mixing valve for use in healthcare premises. This process had fallen seriously behind schedule. The company had their own internal test facilities and as part of the investigation RAH audited the test facility and the test equipment to ensure that the test methods were correctly interpreted and performed and interpreted. Having completed this audit some necessary changes were made and RAH were then able to correctly assess the performance of the product and advise the design engineer on necessary modifications.In this instance the product design was being hampered by an incorrect interpretation of the required testing by the company's design engineer. RAH Consultancy had the expertise to swiftly identify the problem and provide a working solution.