C&R Technologies, Inc. (Littleton, CO) has introduced SINDA/FLUINT 4.3, bringing novel analysis capabilities to thermal designers. One of the key expansions is the inclusion of a top-level module for estimating reliability of the design using statistical analysis methods. SINDA/FLUINT is a design and simulation environment tailored for network-style representations of thermal/fluid systems. These representations may be based on lumped parameter, finite difference methods, finite element methods, or any combination. SINDA/FLUINT is used by over 5,000 engineers in more than 25 countries in the electronics, automotive, and aerospace industries.