Systems and methods consistent with the invention may analyze a business application's data, operations, and relationships and create a corresponding object oriented programming (OOP) model corresponding to the business application entities. In one embodiment the OOP model may be realized in the Java programming language and may include OOP objects, functions, and operators. Each OOP model accurately represents the data, relationships, and rules associated with the corresponding business entity. Once converted to an OOP model, systems and methods consistent with the invention may use standard OOP tools to understand, manipulate, design, redesign, analyze, and modify the business application. This can be done independently of the native business application system, as the OOP model is separate and independent from the business application entities. Modifications made to the OOP model may then be converted back into business application entities and installed in the native system.