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2. Mean time to repair - Wikipedia

   en.wikipedia.org/wiki/Mean_time_to_repair

   Mean time to repair (MTTR) is a basic measure of the maintainability of repairable items. It represents the average time required to repair a failed component or device. [ 1 ] Expressed mathematically, it is the total corrective maintenance time for failures divided by the total number of corrective maintenance actions for failures during a ...

3. Mean time to recovery - Wikipedia

   en.wikipedia.org/wiki/Mean_time_to_recovery

   Mean time to recovery (MTTR) [1] [2] [3] is the average time that a device will take to recover from any failure. Examples of such devices range from self-resetting fuses (where the MTTR would be very short, probably seconds), to whole systems which have to be repaired or replaced.

4. MTTFd - Wikipedia

   en.wikipedia.org/wiki/MTTFd

   where MTTR is the mean time to repair. The MTTF of a system is the sum of MTTF S and MTTF D. To understand the relationship between MTTF S and MTTF D consider the case of a switch that turns a motor on or off. The switch has two failure modes: the switch can fail stuck closed or the switch can fail stuck open.

5. Mean time between failures - Wikipedia

   en.wikipedia.org/wiki/Mean_time_between_failures

   Hence the probability a system fails during a duration T, is given by 1 - exp^(-T/MTBF). MTBF value prediction is an important element in the development of products. Reliability engineers and design engineers often use reliability software to calculate a product's MTBF according to various methods and standards (MIL-HDBK-217F, Telcordia SR332 ...

6. MTTR - Wikipedia

   en.wikipedia.org/wiki/MTTR

   MTTR may refer to: Mean time to repair; Mean time to recovery or mean time to restore This page was last edited on 7 March 2019, at 11:33 (UTC). Text is ...

7. Water heating - Wikipedia

   en.wikipedia.org/wiki/Water_heating

   An 80 US gal (300 L; 67 imp gal) electric storage tank water heater was able to have a minimum energy factor of 86% under the pre-2015 standard, while under the 2015 standard, the minimum energy factor for an 80-gallon electric storage tank water heater is now 197%, which is only possible with heat pump technology. This rating measures ...

8. Heated hose - Wikipedia

   en.wikipedia.org/wiki/Heated_hose

   Heated hose assembly. Heated hoses are hoses used for transporting liquids or molten materials where integral heat is needed for temperature control. Heated hoses are used in bonding technology, filling and dosing systems, medical technology, chemical, pharmaceutical and food industry, extruder applications, and research & development.

9. Glossary of boiler terms - Wikipedia

   en.wikipedia.org/wiki/Glossary_of_boiler_terms

   part of the water level gauge, which normally consists of a vertical glass tube connected top and bottom to the boiler backplate. The water level must be visible within the glass at all times. [3] Grooving erosion of a boiler's plates from the internal water space, particularly where there is a step inside the shell.