From forum post:

I'm using AccuRev and have QB configurations defined that will trigger a build when it detect changes in the specified stream. I would like to detect the changes at a finer level, i.e., by specifying a directory and having QB detect changes from that directory down the hierarchy. For example, say I have a source tree that contains a project that is made up of several components, each component living in a subdirectory of the top-level. I want to define a build configuration for each component and have the configurations build only the component for which the source code specific to that component is changed.