Mean Time To Failure (MTTF) is the average time a non-repairable part or piece of equipment remains in operation until it needs to be replaced. It is a very basic measure that helps predict the lifecycle for components that cannot be repaired. MTTF measures the average lifespan of non-repairable components and pieces of equipment.

Mean time to failure (MTTF) is a maintenance metric that measures the average amount of time a non-repairable asset operates before it fails. Because MTTF is relevant only for assets and equipment that cannot or should not be repaired, MTTF can also be thought of as the average lifespan of an asset.

In reliability analysis, MTTF is the average time that an item will function before it fails. It is the mean lifetime of the item. With censored data, the arithmetic average of the data does not provide a good measure of the center because at least some of the failure times are unknown.

Mean time to failure (MTTF) is the length of time a device or other product is expected to last in operation. MTTF is one of many ways to evaluate the reliability of pieces of hardware or other technology.

Mean Time To Failure (MTTF) is a widely used concept in the field of reliability engineering. Like its counterpart, Mean Time Between Failure (MTBF), it represents an estimate of the amount of time a system is expected to run before failing.