Model checking is a promising technology for verifying critical behavior of software. However, software model checking is hamstrung by scalability issues and is difficult for software engineers to use directly. The second challenge arises from the gap between model checking concepts and notations, and those used by engineers to develop large-scale systems. ComFoRT addresses both of these challenges. It provides a model checker, Copper, that implements a suite of complementary complexity management techniques to address state space explosion. But ComFoRT is more than a model checker. The ComFoRT reasoning framework includes additional support for building systems in a particular component-based idiom. This addresses transition issues.