Compressors are critical to many processes, and the foundations that support compressors need to be designed, assessed and repaired properly to minimize vibration and increase compressor reliability. Although machine bearings, misalignment or other mechanical issues can cause vibration, most vibration problems stem from the foundation. The foundation may have been designed improperly or deteriorated over time or damaged. Perhaps the compressor changed without determining if the existing foundation is suitable for the new weight and dynamic forces.