Maintenance Glossary

Unplanned downtime costs industry billions annually, but the truly expensive problem is often the lost productivity that occurs when no one understands why equipment performs below capacity. Proper maintenance terminology isn’t just academic precision – it’s the foundation for actionable data and smart maintenance strategy.
This glossary explains the critical concepts in modern maintenance and reliability, from fundamental KPIs to advanced Industry 4.0 technologies. Each definition connects directly to practical business impact and measurable results.

Fundamental Maintenance Strategies

Maintenance a significant cost of asset ownership / operation:

• Mean Time to Repair (MTTR)

KPIs and Performance Metrics

• Regular inspections by praxis or requirement
• Maintenance / inspection services is a part of business offering

Strategic Processes and Frameworks

• Analysis needs for increasing up-time / identify root causes
• Application R&D data
• Industry 4.0 improvements / digital twin