Abstract: A system, method, and computer program product are provided for implementing optimal regression test strategies. In use, one or more functional testing entities are identified to be utilized to determine a scope associated with at least one regression test to be performed. The at least one regression test to be performed is associated with at least one change made to a functional system based on multi-dimensional modelling. Additionally, source code is mapped to the one or more functional testing entities, the source code being associated with the functional system. Further, a multi-dimensional impact score is calculated for each of the one or more functional testing entities resulting from the at least one change made to the functional system, based on the mapping of the source code to the one or more functional testing entities. Moreover, an output is generated showing impacted functional testing entities based on the multi-dimensional impact score for each of the one or more functional testing entities.