Abstract: In modeling environments, a user typically interacts with a feature-based model by manipulating a feature of the model using a tool that is capable of achieving a number of different results with respect to the feature. An interface may be displayed that allows for manipulations to be made based on a result to be achieved, rather than by providing a generalized tool to achieve the result. Accordingly, the number of options that are presented on the interface may be reduced by eliminating extraneous options that are associated with the tool but not directly applicable to the desired result. A dynamic help system may be provided that provides targeted, dynamically-generated information relating to the result to be achieved. Furthermore, warnings may be displayed on the interface in real time during the model design process.