The most valuable investment you have made in your application development is the years and years of fine-tuning the business logic to your customer's and market's requirement. This is your 'value-add', your competitive edge. Its redevelopment in another development tool is a huge undertaking. Tens of man years without the guarantee that you will really improve the end-user experience. Do you really want to spend the next several years reinventing the wheel, when you can achieve your objectives in record time and at lower cost with Four J's? Depending on the amount of time and resources at your disposal, you may adopt one of two different approaches.

• The first is to simply recompile the existing application and make minor modifications to the user interface to take advantage of the new graphic elements available. You would adopt this approach if you are under time pressure and need a first solution quickly. In this case you select Business Development Suite as your development environment.
   
• The second approach involves an in depth review of the overall ergonomics of your application. You want to unleash the full power of a graphical user interface and that means reworking screens and perhaps even the workflow of your application. You want to invest the time and resources in your application that will see it through the next ten years. In this case you select Genero as your development environment.