##  [Mean Time to Repair](/mean-time-repair) 

  ##  [Mean Time to Repair](https://engineering.quantumdictionary.io/mean-time-repair-0) 

  

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**Engineering & Applied Technologies Dictionary**

 







 

 

 

 



 

 

 

 

Definition

The arithmetic average elapsed time required to diagnose, repair and restore a failed system or component to specified operational condition, measured over a set of repair events. MTTR is a maintainability metric that depends on how 'repair' and 'restored' are defined (e.g., on‑site swap versus full repair) and whether logistics or administrative delays are included.