This chapter addresses this problem by presenting a demanding packet processor application with a platform and programming language independent interface. The text-based interface has two advantages: it allows (i) to distribute the application as a binary executable pre-compiled for di erent platforms, and (ii) to easily couple the application with arbitrary optimization methods without any modifications on the application side. Furthermore, the design space exploration application presented here is a complex optimization problem that is representative for many other computer engineering applications. For these reasons, it can serve as a computer engineering benchmark application for multiobjective optimizers. The program can be downloaded together with di erent multiobjective evolutionary algorithms and further benchmark problems from http://www.tik.ee.ethz.ch/pisa/.