A method including at least storing a plurality of identifiers and metadata associated with a plurality of integration actions. Each of the identifiers are associated with a readable object of a data source. Each of the integration actions are associated with one of the objects. The method including performing, during a first time period, the integration actions including creating objects, updating objects, or removing objects in a data target according to the corresponding objects of the data source. The method including performing, during a second time period, a discovery stage validation on readable objects of the data source and the data target to discover errors or uncertainties. The method also including performing, during a third time period, a re-validation related to the errors or uncertainties discovered in the discovery stage validation. The second and third time periods being independent of the first time period.