A method and apparatus is provided to assure transformations between applications in an integration project. This assurance of transformations between applications includes mapping one or more related fields from a set of fields between the one or more source applications and the one or more target applications according to a set of integration objectives, checking a type compatibility for each of the one or more related fields mapped between the one or more source applications and the one or more target applications and indicating a mapping status according to the type compatibility between the source applications and the target applications.