Nonmobile, temperature and humidity controlled environments readily accessible to maintenance includes laboratory instruments and test equipment, medical electronic equipment, business and scientific computer complexes, and missiles and support equipment in ground silos.
![telcordia sr 332 telcordia sr 332](https://www.deltapsu.com/uploads_delta/editor_201701121484215438221109.jpg)
![telcordia sr 332 telcordia sr 332](https://dl-preview.csdnimg.cn/11572974/0020-4f8bfba8729f626b91057d652c692409_preview.png)
MIL-STD-217 and Telcordia are the most popular MTBF prediction standards. It is the average time (in hours) expected to failure of a non-repairable component over a specified time period.
![telcordia sr 332 telcordia sr 332](https://www.itemsoft.com/assets/screens/telcordia_md_2.jpg)
MTTF on the other hand is the abbreviated term for Mean Time To Failure. It is the average time (in hours) expected between failures of a repairable component. MTBF Predictions, or MTTF Predictions are conducted to determine the probability of survival and failure rate of your product during early development. MTBF is the abbreviated term for Mean Time Between Failures.