The concept of e-maintenance is wide spread in industry which integrates ICT (information and communication technology) within the maintenance strategy to face the new challenges of supporting e-manufacturing. The maintenance support which includes the resources, services and management, are necessary to enable proactive decision making which includes e-technologies (ICT, web based, wireless etc.) and e-maintenance activities; such as e-monitoring, e-diagnostics and e-prognostics. The monitoring of machines and processes for predictive maintenance and control is critical for sustainable and competitive industry. E-diagnostics is a key component for implementing e-maintenance for the cutting edge of high capital intensive plant.