Maintainability - object property, adaptability to maintain and restore a healthy state by maintenance and repair.

A system allowing repair in the course of its operation, called recoverable. Some systems in fulfilling their functions for reasons of technical or economic conducting repairs not allowed. An example of a non-recoverable for technical reasons, the system is. For economic reasons, not reproducible, such as ball bearings, since by virtue of their production processability new product is significantly less repair and replacement set of mechanical working operations. There are products such as aircraft tires or vanes of gas turbine engines, recovery of which is technically and economically feasible, but is forbidden safety regulations.