The invention relates to a system and a method for integrated development of projects of different levels, especially of automation projects in the MES and Controls area. The integrated development is facilitated by the use of uniform models. In this case a first project planning solution, especially an automation solution at the control level, is created in a first project planning environment (1), a second project planning solution, especially a solution for coordination of processes and/or execution sequences of the first project planning solution, is created in at least a second project planning environment (2) with a common data and/or object model being used by the project planning environments at least for the creation of the project planning solutions of the project planning environments and data and/or objects being identified in one of the two project planning solutions for use in the other project planning solution in each case.