This document discusses computer aided engineering techniques including computer aided design (CAD) and computer aided manufacturing (CAM) software tools. It covers the phases supported by lower and upper computer aided software engineering (CASE) tools, how CASE tools fit into the software development process, and the advantages and disadvantages of using CASE tools. The document also provides examples of using CAD for a pump design including creating a digital model and computational fluid dynamics simulations of the pump at best efficiency point and partial load operation.