Afterwards, the testers were interviewed about their use of the system and were asked to evaluate various aspects of the system on a scale of 1 (easy to use) to 5 (difficult to use) in order to determine its usability based on the System Usability Scale (SUS). The first test run achieved ratings of very good to excellent user friendliness. "The technical affinity within the first test group seemed particularly high, enabling these users to grasp operation very quickly," said Berge. "For this reason we set the bar much higher for the second test group by specifically selecting OR personnel with little prior knowledge of technical systems. Nevertheless, our products still achieved good to very good results according to SUS." Based on the initial data, some useful insight was gained regarding the intuitive operation of the Caliop
software and Surgical Panels
. For example, the initial layout icon was changed to avoid confusion with other functions. In addition, ambiguous terms such as "delete" and "remove" were formulated more clearly and in some cases replaced with checkboxes. Using feedback from the participants, the way in which patient names are displayed was adapted to facilitate quick and certain identification of the patient, and the selection of recordings for archiving was redesigned to be easier to use. "In addition to the insight we gain from clinical experts, finding lead users through this type of cooperation is particularly important for the continued development of these products using agile methods." said James Berge. "Not only do they provide feedback on using the current software, they offer useful suggestions and ideas for new functions and a better understanding of the challenges facing medical technologists."