Abstract: A computer system for assessing the performance of an organisation is configured to load member data and assessment data; assign an assessment type to each member using the member assessment data; send question data including a series of performance criteria questions to each member, which include a set of performance statements provided in contrasting ways such that each member provides two input scores for each performance statement; receive input scores including two scores for each performance statement; store the input scores for each member as results data, which is associated with at least one of the assessment type and the performance statements; process the results data to provide output data by calculating an average difference between the two scores providing a discrepancy metric for each of the set of performance statements, and send the output data including the discrepancy metric representing the performance of the organisation.