Mean Time to Failure (MTTF) is a measure used to estimate the average time a product or system operates before it fails. It is commonly applied to non-repairable items, such as electronic devices or machinery, to help manufacturers and users understand reliability. A higher MTTF indicates a more reliable product, while a lower MTTF suggests a higher likelihood of failure. MTTF is often calculated by taking the total operational time of a group of identical items and dividing it by the number of failures that occurred during that time. This metric is crucial for industries like automotive and electronics, where understanding product lifespan can influence design and maintenance strategies.