Improvement in manufacturing technology has provided machines of higher ratings with better tolerances and controlled behaviour. These machines give rise to considerably higher dynamic forces and thereby higher stresses and in return demand improved performance and safety leaving no room for failures. Paper highlights need for a better interaction between foundation designer and machine manufacturer to ensure improved machine performance. Paper also describes the design aids /methodologies for foundation design. Various issues related to mathematical modeling and interpretation of results are discussed at length. Intricacies of designing vibration isolation system for heavy duty machines are also discussed. Influence of dynamic characteristics of foundation elements viz. beams, columns, and pedestals etc on the response of machine, along with some case studies, are also presented. Paper also touches upon effects of earthquakes on machines as well as on their foundations. Use of commercially available Finite Element packages, for analysis and design of the foundation, is strongly recommended, but with caution.