TechCast LLC is a leading supplier of large pump impellers and has been a pioneer in the use of direct patterns to create quick, production quality impellers for their customers’ product development efforts. Last year, they worked with 3D Systems to do a detailed case study which compared the cost and timing of creating impellers using QuickCast and Voxeljet patterns with one created with a molded wax pattern. In addition, they compared the dimensional accuracy, surface roughness and surface quality of the prototype castings to production castings. The case study was done on an impeller that is currently in production so tooling costs and lead times, as well as actual production costs and times were known. The resulting data serves to provide the most accurate measure to date of the benefit of the process as measured both in dollars and in time.