Nothing works in the power grid without transformers! Therefore, their reliability and longevity is crucial, which only an efficient maintenance and service concept can guarantee. However, aging transformers and increasingly dynamic network operations are making it more and more difficult for the asset management to maintain an overview. The ISO 55000 standard helps to master the complexity. The globally applicable standard provides the framework according to which the asset management should work. Sjouke Bootsma, Director Supply Chain Management at TenneT TSO GmbH, talks to us about this.