When developing Rule sets, breakpoints (F9, or right-click onto the process and choose Breakpoint) can be set to stop the processing at a specific process.

This will help you debugging your rule set and also can be added if you wish the execution to stop for a short check of your classification (and maybe manual editing) before continuing with the rest of the rule set. Setting a Breakpoint will change the icon of the process to a red circle (see figure below).

Enjoy!