For spacecraft design and development teams concerned with cost and schedule, the Quick Spacecraft Thermal Analysis Tool (QuickSTAT) is an innovative software suite that will significantly reduce labor costs and effort associated with the design, analysis, and optimization of spacecraft. Unlike traditional analysis where highly-trained engineers spend days to months developing, running, and evaluating high-resolution models, QuickSTAT provides the similar results in near real-time to a broader range of users. QuickSTAT will enable, on one hand, highly skilled thermal engineers to more effectively explore complex design spaces, while on the other hand give better engineering design access to less skilled engineers and program stakeholders. For thermal analysts involved in multi-dimensional trade studies, QuickSTAT provides the means to rapidly compare hundreds or thousands of discrete design points and identify trends that lead to more optimal design solutions. For designers of low-cost spacecraft, QuickSTAT can enable quick and efficient thermal design trade studies without investing in a high-end thermal analysis tools.