Generating Constraints in a Class Model

A method of generating code from a class model for a modeled system. The class model specifies a plurality of elements of a modeling language and dependencies between elements of a plurality of elements. In operations the method analyzes the class model to identify a first possible source of under-specification with respect to the modeled system in the class model by using pattern recognition to find an occurrence of a first problem pattern of a plurality of problem patterns in the class model, the plurality of problem patterns are then stored in a repository. The method also includes identifying a set of constraint patterns where the at least first constraint pattern is linked in the repository to the first problem pattern. A user may then select a constraint pattern which is utilized in instantiating constraints and generating code based on the class model and the instantiated constraints.