confirm that the Problem is resolved withdraw the Workaround notify any other groups working on the Problem, including third-party suppliers close the corresponding Known Error (if they are kept as separate records) notify the Service Desk that the Workaround is no longer the correct action check that the Problem is in the right category check that the Problem is associated with the correct asset(s) ensure that the Problem history is a complete record ensure that Problem documentation is complete determine whether the information in the Problem record and/or the Workaround should be part of the knowledgebase, and take the necessary action to copy it there notify the Service Desk that the Problem is resolved so they can close related incidents close the Problem
To learn more about problem management, read the little 50-page book Basic Service Management.