Bing found the following results
What is Mean Time to Failure (MTTF)? | MTTF Calculation - Limble …
What Is MTTF? Mean Time to Failure Explained in Detail
Understanding Mean Time to Failure for Measuring Reliability
What Is MTTF? How to Calculate MTTF? | NEXGEN
What Is Mean Time to Failure (MTTF)? | ToolSense
What is mean time to failure (MTTF)? - Minitab
Mean Time to Failure Definition and Formula | Fiix
Mean Time to Failure - an overview | ScienceDirect Topics
The definition of MTTF and MTBF - Differences - WIKA blog
MTTR Versus MTBF: What’s The Difference | IBM