A computer implemented method, system and/or computer program product handle problems caused by a modification to an information technology (IT) system. Problem-data, describing a known problem to a first IT system that occurred during a modification to the first IT system; severity-data, describing a severity of the known problem; and solution-data, describing a solution of steps to be taken to correct the known problem, are received and stored. A modification alert indicates that the modification will be applied to a second IT system that is different from the first IT system. If the first IT system and the second IT system share a pre-determined amount of common features, then a severity map, which describes the known problem, the severity of the known problem, and the solution to the known problem as applied to the second IT system, is displayed to a user of the second IT system.