~ ~ This chapter presented the tools and techniques used in developing the Concurrent Engineering Demonstration System, SNEAKERS. The first item discussed was the expert system shell, CLIPS; then Motif and the Motif interface-building tool, VUIT. Next, an overview of the technique known as storyboarding was given. Finally, the methods used to gain knowledge for use in the expert systems and the interface were discussed. The next chapter will show how a domain for SNEAKERS was selected.