Electric motor maintenance has come a long way in the last 25 years. A quarter of a century ago one of the primary methods for testing motors was “megger” testing. Today, there are more choices and assessment of motors and associated rotating assets can be done quickly and efficiently, if the right technologies are implemented. This white paper will take a look at how we arrived at this point in the motor testing timeline by discussing what methods are available, how they work, and how they can be combined for superior results.