A table saw has a mean time between failures of 313 hours and mean time to repair of 2 hours.In this case,the availability is ______.
A)95.1%
B)99.4%
C)81.7%
D)97.8%

Question

Quizplus · Accepted Answer

The availability of a system is defined as the ratio of its mean time between failures (MTBF) to the sum of MTBF and mean time to repair (MTTR).

Availability = MTBF / (MTBF + MTTR)

Substituting the given values, we get:

Availability = 313 / (313 + 2)
             = 313 / 315

= 0.994 or 99.4%

Therefore, the best choice is (B).

A Table Saw Has a Mean Time Between Failures of 313