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| MTTF (mean time to failure) | |||
mean operating time to failure (Математическое ожидание наработки объекта до первого отказа  cntd.ru Natalya Rovina) | |||
| mean time to failure | |||
| средняя наработка до отказа: 23 phrases in 6 subjects |
| Household appliances | 2 |
| Military | 5 |
| Oil / petroleum | 7 |
| Quality control and standards | 3 |
| Technology | 5 |
| Tengiz | 1 |