Vmetro M5210RP-EFF, User Manual, Page: 125 / 130

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M5000 Series: User Guide
Issued June 20, 2007
F
MTBF Values
The Mean Time Between Failures (MTBF) values given here are
calculated estimations representing the inherent reliability of the
M5000 series SBCs.
The prediction is done according to the Inherent Model in PRISM
v1.5 (System reliability assessment tool). PRISM contains
experience data and methods for predicting component reliability.
Values are calculated for different environments but this does not
mean that operation in this environment is supported. These
environments are:
GB (Ground Benign): Locations with controlled temperature and
humidity.
GF (Ground Fixed) : Locations with moderately controlled
environment.
NS (Naval Sheltered) : Includes sheltered or below deck conditions
on surface ship and equipment installed in submarines.
AIC (Airborne Inhabited Cargo) : Typical conditions in cargo
compartments, which can be occupied by aircrew.
ARW (Airborne Rotary Winged) : Equipment installed on
helicopters.