A mechanical engineering contractor has been using a large and complex C software system for over 12 years. There is no documentation for the system and the maintenance programmers have moved to a different company. In order to take advantage of state-of-the-art parallel machines, the contractor wants the software to be re-implemented on a parallel platform.

Briefly describe the techniques that will be needed to accomplish the task.

How would you go about performing the job, bearing in mind the merits of software reuse?