I agree with kubiiii. Since a rewrite is in the card (hopefully) there is something wrong with the entire system. * Identify where the applications interact w

I agree with kubiiii. Since a rewrite is in the card (hopefully) there is something wrong with the entire system. * Identify where the applications interact with each other. * Identify the most problematic applications. * Rewrite those (starting with the smallest) while trying to keep the interfaces between applications constant. And involve end users as much as possible.