The Analysis menu (or the Impact menu prior to release 4.620) contains options to report inconsistencies between maps, QA Build parameter sets and the data dictionary.
Impact report looks at maps, table and field processing,(but not at totalling or formula processing). All maps are looked at, not just QAB maps. It reports various inconsistencies with the data dictionary.
The Corrections option is similar to the Impact report but contains facilities to remove some inconsistencies from maps.
Missing maps looks for maps used by QAB programs but missing from the database.