We need to differentiate between the users who are. 1. applying the technology (could be different from those interpreting results) 2. interpret the results and make treatment decisions. 3. take care of service and maintenance. Training materials: writing and/or translation, other adaptation? Personal training: individual and/or group sessions, number and length of sessions, number and qualifications of trainers. Are regular/ frequent standardisation or quality checks required? E.g. CME points.