Without a doubt, the wind turbine has evolved dramatically over the last few years in terms of reliability, technology, efficiency, size and total share of energy production. These ongoing improvements are increasingly benefiting consumers from all around the world, making wind energy not only an accepted part of the world energy supply mix but also an important one. Along the same lines, however, there are also stricter requirements for uptime and the levelised cost of energy. The tolerance for downtime and unnecessary maintenance costs is becoming less and less, thus making the role wind turbine condition monitoring plays in the overall wind turbine healthcare strategy more and more critical.