So as to avoid repeating your applications manually, Objecteering/UML has made Automated Design Patterns available for you. Design Patterns are ready made solutions. They are automated, and can, therefore, transform the Analysis model into a more powerful Design model, thus increasing the power of the model itself, before applying code generators to make it even more effective. All you have to do is select the Design Patterns best adapted to your architectural choices.

Has your business model changed ?
Re-apply your Automated Design Patterns to your modified model

Has your technical target evolved ?
Update your Design Patterns and re-apply them to your unchanged business model.