Over time the design of a program can often become "lost". The original designers may have retired or changed jobs. The documentation may be incomplete or misplaced. Numerous undocumented changes may have been made since the program's inception. After a while, developers are afraid to make changes to the program because unintended side-effects may occur.

Whatever the reason, Jerry can usually recover and document the design of your programs. This process ultimately reduces maintenance costs and permits new features to be added.