Abstract
Establishing and using a critical path is useful for the improvement of medical quality. Furthermore, it is important to repeatedly revise it while in use. A critical path can be improved based on four approaches：1) comparison with critical paths used at other institutes, 2) investigation of evidence based medicine, 3) analysis of the DPC data and 4) variances-analysis of the critical path. In this study, we present our experience in the revision of a critical path at the National Hospital Organization Kyushu Medical Center.
