Although new criteria for hospital accreditation have been announced in Taiwan, a simple pass-or-fail report card does not tell hospital administrators what needs improvement. Such information is required if hospitals are expected to improve rather than stagnate. Therefore, we used an accreditation inventory with 67 management items, 10 of which were scaled with 2 categories and 57 with 3 categories. We investigated (1) whether the study scores are addible, (2) how to calculate both indictors of coherence and deviation using the norm-criterion-based method, and (3) whether it is possible to generate a Microsoft Excel performance sheet that shows what items need to be improved. Both a deviation index and a coherence coefficient were used to draw both scatter plots and bar-chart plots. We found that the study data could be unidimensional and thus allow scores to be addible. The computer program created to analyze the accreditation inventory can be used to provide feedback for improvements. This should help administrators efficiently and objectively evaluate their hospital's performance strengths and weaknesses and focus on areas that need improvement.