1. A device comprising: a memory to store instructions; and a processor to execute the instructions in the memory to: identify a first system and a second system as systems to be integrated, the first system being associated with a first entity to be merged with a second entity, and the second system being associated with the second entity, identify a scope of integration of the systems based on: a first level that identifies the systems, a second level that identifies one or more processes associated with the systems, and a third level that identifies one or more business rules associated with the one or more processes, apply at least one depth-first search (DFS)-based algorithm to at least one of the one or more business rules, identify, based on the identified scope of integration and based on applying the at least one DFS-based algorithm, at least one fault in the at least one of the one or more business rules, and modify the at least one of the one or more business rules based on the identified at least one fault.