Abstract: To allow simplified illustration of the complex technical relationships for a complex software product, provision is made for the structure of the complex software product to be mapped, in at least one embodiment, using an at least three-dimensional system matrix. In this context, the latter is generated by the variables functionality, program components and version level. The complex software product of at least one embodiment is formed by a plurality of functionalities, each functionality being formed by the interaction of a plurality of executable program components associated with it and the program components having one of a plurality of possible version levels. In at least one embodiment, the system matrix is used to check, verify and possibly extend a customer configuration for the software product. At the same time, the matrix is also used to extend the complex software product on the software provider side.