Decision support tool prototypes are often evaluated in human-in-the-loop simulation experiments. Mosaic ATM personnel have significant previous experience in the design and conduct of simulations at NASA, including the Future Flight Central facility and Aircraft Target Generator (ATG), as well as the FAA Technical Center, including the Target Generation Facility (TGF) and Pseudo-Aircraft System (PAS) systems. Such simulations have included concept evaluations of Surface Management Systems (SMS), CTAS Final Approach Spacing Tool (FAST), Dynamic Resectorization, and varied TFM concepts.